Operating Manual - Neumann Studio Monitors
Contents
1. 25 Sp cifications we 26 Accessories ORO EA 28 Manufacturer 5 29 Technical information amp glossary 30 Appendix System block I Pin assignment of the XLR socket ee I Pin assignment of the REMOTE CONTROL AND RS 232 socket I Acoustical measurements II IV KH 810 870 1 NEUMANN Hazard warnings on the rear of the product 2 KH 810 870 Important safety instructions 1 N rw 10 11 12 13 14 15 16 17 18 The label shown on the right is attached to the rear of Read these instructions Keep these instructions Always include these instructions when passing the product on to third parties Heed all warnings Follow all instructions Do not use this apparatus near water Only clean the product when it is not connected to the mains power supply Clean only with a dry cloth Always ensure a free air flow through the ventilation openings on the rear of the product Install in accordance with the manufacturer s instructions Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polari2. KH 870 KH 870 0 410 KH 870 0 410 Free field response Group delay Freifeld Frequenzgang Gruppenlaufzeit R ponse en champ libre Temps de propagation de groupe Respuesta en frecuencia en campo libre Retardo de grupo 60 0 02 0 1 05 1 2 5 10kHz 0 05 02 05 1 2 5 10kHz NEUMANN BERLIN KH 870 Distortion at 95 dB SPL Verzerrung bei 95 dB SPL THD a 95 dB SPL Distorsion con un SPL de 95 dB 50 100 200 Hz KH 810 KH 810 KH 120 Free field response Freifeld Frequenzgang R ponse en champ libre Respuesta en frecuencia en campo libre 0 02 0 1 05 1 2 5 10kHz KH 810 Harmonic distortion at 95 dB SPL Klirrfaktor bei 95 dB SPL Distorsion harmonique a 95 dB SPL Distorsi n arm nica total a 95 dB SPL KH 870 Maximum SPL at 1 m 1 and 3 Maximaler SPL bei 1 m 1 und Niveau SPL maximal 4 1 m 1 et 3 SPL m ximo a 1 m 3 y 1 dB 110 100 90 80 70 50 50 100 200 Hz KH 810 KH 120 Group delay Gruppenlaufzeit Temps de pro
3. KH 810 870 17 LOW CUT dB NEUMANN gt Calibrate the frequency response the phase and the acoustical level of the subwoofer To do so choose one of the following methods 1 Calibration using an acoustical measurement system Calibrating the frequency response phase and sound pressure level by means of an acoustical measurement system should always be your first choice since it yields the highest accuracy This method is described below 2 Calibration using Neumann test signals In the absence of an acoustical measurement system you can calibrate the settings of your subwoofer using Neumann test signals see page 19 3 Calibration using music signals and an 80 Hz test signal A calibration by means of music signals is also possible but should always be the last choice In this case use the built in 80 Hz test signal generator to calibrate the phase see page 19 If you are using several subwoofers it is possible that the same setting is not valid for all subwoofers gt Calibrate each subwoofer separately gt If necessary move the subwoofer and or the main loudspeakers gt If necessary apply acoustical treatment to the source of any reflections Calibration using an acoustical measurement system The settings of the potentiometer SUBWOOFER GAIN INPUT GAIN recommended in the following table are valid for the following settings of your Neumann loudspeaker INPUT GAIN O dB and OUTPUT LEVEL 100 dB SPL
4. L R gt 80 LFE gt SUB ONLY lt 80 SUB ONLY lt 120 DIRECT IN gt SUB ONLY 1 1 3 LFE gt SUB ONLY lt 120 4 DIRECT IN SUB ONLY 20 Hz 80 Hz 120 Hz Up to 80 Hz the LFE channel is reproduced by the sub woofer Above 80 Hz the LFE channel is routed to the audio outputs OUTPUT LEFT and RIGHT To compensate for a 6 dB acoustical gain when reproducing the signal via the audio outputs OUTPUT LEFT and RIGHT a 6 dB electrical attenuation is applied This mode works with all formats and is consistent with the standard downmix coefficients seen in consumer decoders Additionally this mode is useful for detecting higher fre quency signals in the LFE channel that should be avoided during mixing The LFE channel is reproduced up to 80 Hz in the subwoofer only This setting comes from a recommendation by Dolby and THX to pre filter the LFE channel and is used to simu late consumer decoders that do not reproduce the upper part of the LFE bandwidth The LFE channel is reproduced up to 120 Hz in the subwoofer only This is the norm for the movie industry Please note that during mixing unwanted higher frequency signal components above 120 Hz in the LFE channel are not reproduced by the subwoofer The LFE channel is reproduced by the subwoofer only There is no filtering of the LFE channel Select this setting if you want to daisy chain additional subwoofers see page 13 and if an ex
5. NEUMANN KH 810 870 ACTIVE SUBWOOFER WITH 7 1 HIGH DEFINITION BASS MANAGEMENT OPERATING MANUAL NEUMANN Contents Important safety instructions 2 The KH 810 870 subwoofer cr 4 4 n ee RE CR EAT 4 Product overview rr 5 Installing and connecting the KH 810 870 8 Preparing the subwoofer 8 Preparing the 8 Setting up the subwoofers 9 Connecting the subwoofer 11 Using the KH 810 870 ioo sad honda eme sent 17 Switching the subwoofer on off ees 17 Calibrating the 17 Compensating for larger time of flight TOF differences 20 Using the bass 20 Boosting the LFE channel and adjusting the LFE mode 20 Activating ground lift 22 Remote controlling the 22 Resetting the settings of the KH 810 870 24 Cleaning and maintaining the 25 Troubleshooting
6. 7 1 Channel High Definition Bass Manager is compatible with all formats from mono to the latest 7 1 High Definition systems Eight analog channels ensure flexible intercon nectivity for modern studios Four mode LFE channel processing ensures maximum compati bility across all formats 4 order crossovers and flexible acoustical controls allow for seam less system integration The built in volume control allows for centralized system adjustment independent of the source The latest high efficiency amplifiers and acoustical components have been used to ensure the most accurate sound reproduction possible Neumann products are designed for longevity so we hope you enjoy many happy years of using this product Compatibility The 7 1 Channel High Definition Bass Manager is compatible with the following formats 7 1 7 0 HD Blu ray video gaming 7 1 Theatrical 5 front channels 6 1 6 0 DVD DVD Audio SACD 5 1 with an additional 2 0 2 channel stereo system 5 1 5 0 DVD multi channel CD HDTV video gaming 3 1 0 LCRS 2 0 2 channel stereo reproduced with or without a subwoofer 1 0 mono Larger audio systems can be built using several subwoofers Delivery includes KH 810 subwoofer or KH 870 subwoofer Mains cables European UK and US version Operating manual PP eB Supplement Getting Started Quickly The current operating manual as well as the supplement Getting Started Quickly can
7. 8 The temperature of the power ampli fier is too high The values of the switches have been changed by the remote control for the level controls The signal level is too high the protection system is active Check all cabling to eliminate the cause of the problem use bal anced cables use the ground lift switch see page 22 or send higher signal levels from your source and reduce the level on your subwoofer and your monitors Set the switch BASS MANAGEMENT 47 to BASS MANAGEMENT Ensure sufficient ventilation of the subwoofer and or reduce the input signal level or add extra subwoofers to increase LF head room When the temperature has dropped again the LED POWER ON lights up constantly and the output level reduction is canceled Deactivate the remote control for the level controls To do so read and follow the instructions and warning notes on page 23 If necessary reset the settings of the KH 810 870 see page 23 Reduce the signal level For further information please refer to the Questions amp Answers section at www neumann com KH 810 870 25 NEUMANN BERLIN Specifications Acoustics KH 870 KH 810 3 dB free field frequency response 18 Hz to 300 Hz 3 dB Pass band free field frequency response 19 Hz to 300 Hz 2 dB Self generated noise lt 20 dB A at 10 cm with input gain set to 100 dB for O dBu Total harmonic distortion lt 0 5 at 95 dB SPL at 1 gt 40
8. PHASE in combination with the switch SUBWOOFER PHASE to values of O 45 90 135 1807 225 270 and 315 until you have found the setting that gives the lowest sound pressure level at the listening position at the cut off frequency of 80 Hz 180 phase shift between subwoofer and loudspeaker maximum level cancelation Set the switch TEST SIGNAL to OFF Set the switch SUBWOOFER PHASE to the opposite position The phase shift between loudspeaker and subwoofer is now O KH 810 870 19 NEUMANN Compensating for TOF differences by means of an electronic time delay BASS manacement MI Using the LFE 10 dB gain 20 KH 810 870 Check the settings of the sound pressure level and frequency response by means of music signals Listen for a smooth extension of the frequency response of the main loudspeakers down to 20 Hz To to this proceed as follows gt Listen to music containing content down to 20 Hz Activate and disable the bass management by repeatedly moving the switch BASS MANAGEMENT 7 between the two positions There should be no increase or decrease in level below 80 Hz Compensating for larger time of flight TOF differences If the subwoofer is placed at a distance gt 2 m 6 6 behind the loudspeakers with reference to the listening position the subwoofer s integrated compensation settings will not suffice gt Connect the KH 810 870 to an electron
9. The acoustical axis is a line perpendicular to the subwoofer s front panel along which the microphone was placed when tuning the subwoofer s crossover during design The acoustical axis is located at the midpoint of the KH 810 s bass driver or at the midpoint of the bass drivers of the KH 870 The acoustical controls are low order analog filters designed to compensate for some of the acoustical issues commonly found in listening environments The acoustical controls settings will depend on the subwoofer s location and will probably be different for the same subwoofer type positioned in dif ferent locations in the same room When calibrating subwoofers there are three areas requiring atten tion in room response level relative to main loudspeakers and phase relative to main loudspeakers 30 KH 810 870 NEUMANN BERLIN Acoustical Depending on the setting of the potentiometer SUBWOOFER GAIN INPUT GAIN and the switch output level SUBWOOFER GAIN OUTPUT LEVEL 2 and referred to an input signal level of O dBu the following acoustical output levels can be obtained Setting of potentiometer Acoustic output level dB SPL of the subwoofer at 1 m SUBWOOFER GAIN when input signal level is O dBu INPUT GAIN 22 Setting of switch Setting of switch SUBWOOFER GAIN OUTPUT SUBWOOFER GAIN OUTPUT LEVEL j 100 dB LEVEL 2 114 dB 12 dB 88 dB SPL 102 dB SPL 10 dB 90 dB SPL 104 dB SPL 8 dB 92 dB SPL 106 dB SP
10. at 1 m for O dBu For information on how to set your Neumann loudspeaker please refer to its operating manual If the mentioned values cannot be set on your loudspeaker adjust the subwoofer accordingly Calibrating the The frequency response of a subwoofer depends on its position in the room and on the room frequency geometry The same subwoofer installed in different positions in the same room may require response different acoustical control settings gt Adjust the frequency response of the subwoofer at your listening position To do so proceed as follows Me gt Make sure that the switch SUBWOOFER GAIN OUTPUT LEVEL is set to 100 dB SPL at 1 m 1m for 0 dBu for dBu INPUT GAIN dB gt First set the potentiometers SUBWOOFER GAIN INPUT GAIN and LOW CUT to the following settings These settings can be used as a Starting point for further adjustment In a corner 8 dB 4 dB Next to or flush 4 dB 2 dB mounted in an acoustically solid wall e g brick concrete Next to or flush 2 dB O dB mounted in an acoustically soft wall e g gypsum Free standing inan 2dB O dB untreated room Free standing ina O dB O dB well treated room 18 KH 810 870 NEUMANN GAIN dB FREQUENCY Hz Calibrating the subwoofer level dB SPL at Am for o dBv INPUT GAIN dB Calibrating the phase BASS B manacement MM test SIGNAL H on gt Check the frequency
11. can be found in the section Boosting the LFE chan nel and adjusting the LFE mode on page 20 The socket OUTPUT SUM 10 allows you to connect additional subwoofers There is no volume control on this output as volume control is performed locally in each subwoofer Using 4 order filters the crossover divides the input signal of each channel into two bands for repro duction by the subwoofer or the main loudspeakers The crossover frequency is fixed at 80 Hz for all the main channels and can be bypassed when required This frequency was chosen to balance the conflicting requirements of having a high crossover frequency to relieve the main loudspeakers of of their low frequency duties thereby reducing distortion and of the need to have a low crossover fre quency to minimize the chances of localizing the subwoofer thereby giving greater flexibility when placing the subwoofer in the room In addition by choosing 80 Hz there is a compatibility with the replay conditions commonly found in consumer products Long throw efficient low distortion drivers ensure a clean sound quality even at high replay levels The drivers are loaded by the internal volume of the cabinet and are magnetically shielded for use next to CRT screens and magnetic storage media Low Frequency Effects Dolby or Low Frequency Enhancement dts The LFE channel has a lim ited bandwidth Because of the limited frequency range of the LFE channel it is referred
12. to acclimatize to room temperature before using it Do not overload wall outlets and extension cables as this may result in fire and electric shock WARNING Danger of hearing damage due to sudden high sound pressure levels Audio signals that are present at switch on of the product or that can be present during operation can create sudden very high sound pressure levels which can damage your hearing gt Always lower the output level of the audio source before connecting it to the subwoofer or starting it pressing play This subwoofer can be used for commercial purposes Commercial use is subject to the rules and regulations of the trade association responsible Neumann as the manufacturer is there fore obliged to expressly point out possible health risks arising from use This subwoofer is capable of producing sound pressure levels exceeding 85 dB A SPL This is the sound pres sure corresponding to the maximum permissible level which is by law in some countries allowed to affect your hearing for the duration of a working day 8 hours It is used as a basis according to the specifications of industrial medicine Higher sound pressure levels and or longer durations can damage your hearing At higher sound pressure levels the duration must be shortened in order to prevent hearing damage The following are signs that you have been subjected to excessive sound pressure levels for too long a time You can hear ringing or whist
13. Hz gt 45 Hz Max SPL in half space with 3 THD at 1 m 116 7 dB SPL 110 7 dB SPL averaged between 40 Hz and 90 Hz Max SPL with pink noise in half space at 1 m linear 118 dB SPL 112 dB SPL Electronics CET CET Amplifier continuous peak output power 320 W 400 W 160 W 200 W THD and noise at continuous load lt 0 1 60 dB with deactivated limiter Controller design analog active Crossover frequency of main channels 80 Hz Crossover slope 24 dB oct 4 order Acoustical control Low cut center frequency 30 Hz Q factor 1 5 gain range O to 12 dB Acoustical control Parametric equalizer bypassable gain 4 to 12 dB frequency 20 Hz to 120 Hz Q factor 1 to 8 Time of flight adjustment delay 0 to 315 adjustable in steps of 45 Volume control 100 dB SPL 114 dB SPL Input sensitivity 12 dB 2 dB Calibration tools internal signal generator Protection circuitry peak and thermal limiters Infrasonic filter frequency slope 6 5 Hz 12 dB oct Remote control via cable remote control and RS 232 Analog inputs and outputs Input output channels 7 1 7 Sum Impedance electrically balanced XLR 13 kQ Input sensitivity 8 dBu 6 dBu switchable CMRR of inputs gt 60 dB at 15 kHz Max input level 19 dBu 6 9 V Cross talk between channels 1 kHz lt 95 dB Level matching 0 1 dB Volume control range 118 dB via remote control 0 25 dB steps Dynamic range THD N 119 dB A lt 0 001 at 100 dB LFE modes 80 re routi
14. ION Damage to the product due to overheating If air cannot circulate properly through the ventilation openings 4 on the rear of the prod uct the power amplifiers may overheat leading to premature activation of the thermal pro tection system which limits the maximum output level of the subwoofer In rare cases dam age to the product may also occur gt Never cover the ventilation openings gt When installing the product into tight spaces such as wall recesses maintain an air gap of at least 2 5 cm around the subwoofer s backplate to ensure a free air flow through the ventilation openings i For information on installation please refer to the supplied Getting Started Quickly supplement This will help you set up the subwoofers and loudspeakers in a way that will give you the best acoustic performance from the system For further information on setting up subwoofers and loudspeakers please refer to the Questions amp Answers section at www neumann com Preparing the subwoofer CAUTION Risk of staining surfaces Some surfaces treated with varnish polish or synthetics may suffer from stains when they come into contact with other synthetics Despite a thorough testing of the synthetics used by us we cannot rule out the possibility of staining gt Do not place the KH 810 870 on delicate surfaces The bottom of the subwoofer features rubber feet which reduce the risk of scratching the sur face and the su
15. L 6 dB 94 dB SPL 108 dB SPL 4 dB 96 dB SPL 110 dB SPL 2 dB 98 dB SPL 112 dB SPL O dB 100 dB SPL 114 dB SPL 2 dB 102 dB SPL 116 dB SPL The default setting is SUBWOOFER GAIN INPUT GAIN O dB and SUBWOOFER GAIN OUTPUT LEVEL 100 dB SPL at 1 m which corresponds to a sound pressure level of 100 dB SPL mea sured at a distance of 1 m when the input signal has a level of O dBu Using the potentiometer SUBWOOFER GAIN INPUT GAIN and the switch SUBWOOFER GAIN OUTPUT LEVEL you can compensate for level differences due to acoustical loading see page 10 and due to different distances of the subwoofers and loudspeakers from the listening position Examples of how to calculate sound pressure levels as a function of the input signal levels and input and output levels of the KH 810 870 Absolute voltage level of 0 dBu 4 dBu 6 dBu 16 dBu input signal 0 775 V 1 23 V 1 55 V 4 89 V Setting SUBWOOFER GAIN INPUT GAIN g 9 p g Setting SUBWOOFER GAIN OUTPUT LEVEL 100 100 100 100 Measured output level in dB 100 104 106 116 SPL at 1m Acoustical Neumann subwoofers are designed to have a flat pass band magnitude response in anechoic condi response tions when all the acoustical controls are set to O dB When a subwoofer is installed into a listening environment the response changes and thus should be corrected back to a flat response It is there fore expected that the acoustical controls will need adjust
16. LO or SELECT type functions as seen in mix ing consoles However it is possible to MUTE and SOLO one or more of the loudspeaker outputs using an RS 232 control This is useful when setting up the system play some bass heavy material at high levels with all the main loudspeakers muted subwoofer is soloed to find the source of rattles in the listening room Using subwoofer mute and bass management together gives some useful additional functionality ON ON 18 Hz ON MUTED 80 Hz DISABLE ON Main loudspeaker s LF cut off DISABLE MUTED Main loudspeaker s LF cut off KH 810 870 33 NEUMANN System block diagram System Blockdiagramm Synoptique syst me Diagrama de bloques del sistema LEFT BACK H 7 vac LEFT BACK m m m RIGHT BACK C 755 vor 95 RIGHT BACK eres NE EC ee EN PRA Mute LEFT eS LEFT SURROUND 99 30 WL SURROUND 1 1 RIGHT 5 RIGHT SUM Em SURROUND 2 AT SURROUND 1 ES X zH 30 He a m E ds um um k f orn n 1 LEFT UN 80 eH voc LEFT TON ne m Low Cut P tric Ph Output RIGHT a He vor RIGHT CE CENTER 7 VOL CENTER DIRECTIN s La
17. also be downloaded from the Downloads area on the product page at www neumann com Note that imperial dimensions are approximate NEUMANN Product overview Neumann logo Metal grille 3 Bass reflex ports KH 810 870 5 NEUMANN 6 KH 810 870 11 MAINS VOLTAGE SELECTION switch MAINS POWER switch 6 OPTIONAL REMOTE POWER ON OFF socket IEC mains socket with protective ground contact Sockets INPUT LEFT CENTER RIGHT INPUT LEFT SURROUND RIGHT SURROUND INPUT LEFT BACK RIGHT BACK INPUT DIRECT IN LFE SUM socket OUTPUT SUM socket Sockets OUTPUT LEFT CENTER RIGHT OUTPUT LEFT SURROUND RIGHT SURROUND OUTPUT LEFT BACK RIGHT BACK 12 REMOTE CONTROL AND RS 232 socket 100000000 m vu 0001 NEUMANN ugs INPUT OUTPUT LEFT e su g su e 2 52 2 52 Li Q El amp C w cur il a e 59 ge za zz 5 Em as AA AAA RSS S 43 INPUT GROUND LIFT switch Ventilation openings 45 POWER ON LED red lights up red subwoofer is switched on and ready for operation flashes red slowly protection system is active output level is reduced by 6 dB flashes red rapidly subwoofer booting up just after switch on is off subwoofer is switched off BASS MANAGEMENT LED green lights up green bass management activated is off bass manag
18. as acoustical measurements a block diagram of the KH 810 870 and the pin assign ments of the XLR socket and the REMOTE CONTROL AND RS 232 socket 42 be found at the end of this operating manual KH 810 870 27 NEUMANN 28 KH 810 870 Accessories FO 810 Flight case for KH 810 FO 870 Flight case for KH 870 RC 2 Remote control cable 2 m RC5 Remote control cable 5 m RC 10 Remote control cable 10 m RC 15 Remote control cable 15 m RC 20 Remote control cable 20 m RC 25 Remote control cable 25 m RC 30 Remote control cable 30 m REK 3 Remote electronics kit SC2 Subwoofer cable 2 m 5 5 Subwoofer cable 5 SC 10 Subwoofer cable 10 m SC 15 Subwoofer cable 15 m SC 20 Subwoofer cable 20 m SC 25 Subwoofer cable 25 m SC 30 Subwoofer cable 30 m SEA 1 Subwoofer EtherCon adapter NRC 1 Subwoofer remote control Some hardware for mounting loudspeakers on top of KH 870 subwoofers is also available For further information and the complete range of Neumann mounting hardware parts and how they can be used refer to the PDF file Hardware Mounting Matrix that can be downloaded from www neumann com Detailed mechanical drawings of the Neumann products are also available there NEUMANN Manufacturer Declarations Guarantee For the current terms and conditions of the product guarantee please visit www neumann com In compliance with the following requirements WEEE 2002 96 EC Please dispose of the product at the e
19. bwoofer cabinet and acoustically isolate the subwoofer from the surface If you want to hide the subwoofer gt Use a thin open weave cloth To provide visual cover you can use two layers of the cloth Preparing the room gt Arrange all acoustically relevant surfaces and objects symmetrically on either side of the listening axis of the room left right gt Minimize the sound that is reflected back to the listening position by using angled surfaces and or acoustical treatment i This product has been optimized for use in recording studios In order to avoid affecting the quality of reproduction make sure that the product is used in an EMC environment NEUMANN Setting up the subwoofers Choosing the type of set up The bass reflex ports are located on the front panel of the subwoofer allowing the subwoofer to be either set up in a room or flush mounted into a wall recess Flush mounting the subwoofer into a wall recess offers the following advantages A solid wall boosts the level of the subwoofer in the room which can be compensated by reducing the output level of the subwoofer This also reduces distortion resulting in a cleaner sound reproduction Reflections from the wall behind the subwoofer are eliminated so that the frequency response becomes smoother The subwoofer does not occupy space in the room If you want to flush mount the subwoofer into a wall recess gt Have the wall constructed by an experienced acoust
20. control parameters Adjustment of the system output level level of the subwoofer and level of the signals avail able at the output sockets OUTPUT LEFT CENTER RIGHT LEFT RIGHT SURROUND amp LEFT RIGHT BACK 17 see the section Activating deactivating the remote control for the level controls on page 23 Activation deactivation of the bass management see page 20 O dB 10 dB gain of the LFE channel see page 20 For information on the use of an NRC 1 remote control please refer to its operating manual Note that no audio passes down the remote control cables only control signals and data Using a RS 232 Using a RS 232 data link you can remote control additional parameters of the subwoofer data link Muting of all and or individual channels Level control of individual channels Activation deactivation of the bass management and rear bass management see page 20 Activation deactivation of the LFE channel gain see page 20 Resetting of settings of the KH 810 870 see page 23 In addition using a RS 232 data link you can read out the following parameters Muting of each channel Level of each channel Firmware revision The PDF file 7 1 bass manager control protocol contains a list of the RS 232 com mands that can be used to control the KH 810 870 and it can be downloaded from the KH 810 870 product page at www neumann com 22 KH 810 870 NEUMANN Activating deactivating the remote control fo
21. e absolute level of O dBu is 18 dBFS EBU standard R68 In the US 4 dBu is 20 dBFS SMPTE standard RP155 These dBu values should lead to the following sound pressure levels Application Sound pressure level Film 85 dB C Broadcast 79 dB C reference level Music No defined reference levels Near field loudspeakers can be as close as 1 m from the listening position whereas loudspeakers in a Dolby certified movie mixing room should be at least 5 m from the listening position In the examples below it is assumed that the listener is inside the room radius and thus the sound field decays according to 20 log r however this may not always be the case Absolute voltage level of input signal SUR oa Setting SUBWOOFER GAIN INPUT GAIN 02 1 dB 5 dB Setting SUBWOOFER GAIN OUTPUT LEVEL Ci 100 100 Listening distance m dB change 5m 14dB 5m 14 dB Measured output level in dB SPL at 85 dB SPL 85 dB SPL Maximum input signal before activation 17 dBu 17 dBu of the protection system Absolute acoustic level calibration for signal channels is generally achieved using a sound level meter set to C weighted and Slow Play a broadband pink noise test signal set to 18 dBFS Europe or 20 dBFS USA on the console meters and measure the sound pressure level at the listening posi tion Then adjust each channel s source level not the loudspeakers and subwoofer s so that the above stated sound pressure levels are achieved
22. ease refer to the Product Selection Guide at www neumann com In addition the sub woofer electronics are shown separately from the KH 810 to provide better clarity gt Use balanced XLR cables to connect the corresponding sockets OUTPUT of the subwoofer to the input sockets of the loudspeakers as shown in the following diagrams Internal Subwoofer Signal or Driver Cable DC nn when Remote Electronics Kit REK3 is used Connection of a 7 1 system Optional additional subwoofers ee eeeee CIC ICI CIC IC JAN SN The diagram Connection of a 7 1 system also demonstrates that the built in 7 1 Channel High Definition Bass Manager can be used to build 1 0 2 0 3 1 0 5 0 5 1 6 0 6 1 and 7 1 Theat rical systems Internal Subwoofer Signal or Driver Cable DC nn when Remote Electronics Kit REK 3 is used Simultaneous connections of 5 1 and 2 0 signals Optional additional subwoofers 12 810 870 NEUMANN The diagram Simultaneous connections of 5 1 and 2 0 signals shows the possibility of an additional bass extension for a 2 0 signal gt First set up a 5 1 system gt Connect a stereo signal to the unused sockets INPUT LEFT BACK and RIGHT BACK 8 gt Connect an additional pair of loudspeakers to the unused sockets OUTPUT LEFT BACK and RIGHT BACK 17 You now have a separate 2 0 system that can use the subwoofer
23. ee second delay before sound can be heard from the KH 810 870 in order to avoid noises pops from preceding equipment switched on at the same time Con versely switching off the subwoofer immediately mutes the audio gt Carry out all steps described in the chapter Preparing the subwoofer for remote on off switching on page 16 gt Make sure that the switch MAINS POWER 5 is set to ON gt Apply 12 V DC to remotely switch the subwoofer electronics on or apply O V DC to remotely switch the subwoofer electronics off Calibrating the subwoofer Before using your system for the first time and whenever you change the physical conditions in your studio carry out the following steps gt Adjust the frequency response and the level of the loudspeakers before calibrating the sub woofer see the operating manual of the loudspeakers Application Recommended frequency response Studio flat Film X curve shape Cf ANSI SMPTE 202M the shape of the X curve depends on the size of the room Home subjective evaluation Not necessarily a flat response a gently downward sloping response with increasing frequency is often preferred All the loudspeakers in the system should have the same level at the listening position This is often measured using a pink noise test signal that is set to 18 dBFS Europe or 20 dBFS USA on the mixing console s output level meters and a sound level meter set to C weighted and slow
24. ement disabled 2 BASS MANAGEMENT switch REAR CH BASS MANAGEMENT switch VOLUME CONTROL switch TEST SIGNAL switch SUBWOOFER GAIN OUTPUT LEVEL switch SUBWOOFER GAIN INPUT GAIN potentiometer SUBWOOFER PHASE switch 4 SUBWOOFER PHASE rotary switch PARAMETRIC EQUALIZER switch Potentiometers PARAMETRIC EQUALIZER GAIN PARAMETRIC EQUALIZER Q PARAMETRIC EQUALIZER FREQUENCY LOW CUT potentiometer 28 LFE GAIN switch 29 LFE MODE rotary switch KH 810 870 7 NEUMANN 8 KH 810 870 Installing and connecting the KH 810 870 Have the product installed and connected by a specialist Due to his her technical training know how and experience as well as knowledge of relevant provisions regulations and stan dards the specialist must be able to assess assigned tasks recognize potential hazards and ensure appropriate safety measures The following safety and mounting instructions are addressed to this specialist CAUTION Danger of injury and material damage due to tipping dropping of the product If improperly mounted the product and or the mounting hardware e g rack can tip over or drop down gt Always have the product mounted by a qualified specialist according to local national and international regulations and standards gt Use the mounting systems recommended by Neumann and always provide sufficient addi tional protection against tipping or dropping by means of safety wires CAUT
25. er PDF 7 1 High Definition Bass Manager Remote Control Wiring Dia gram contient un sch ma de brochage pour confectionner une t l commande individuelle pour le KH 810 870 Vous pouvez t l charger ce fichier PDF depuis la fiche produit du KH 810 870 sur www neumann com En el archivo PDF 7 1 High Definition Bass Manager Remote Control Wiring Diagram se encuentra un diagrama para hacer su propio control remoto para el KH 810 870 Puede descargarlo en la p gina del producto KH 810 870 de www neumann com Acoustical measurements Akustische Messungen Mesures acoustiques Mediciones acusticas Below are acoustical measurements conducted in anechoic conditions at 1 m Color versions of these graphs can be found on the appropriate product page of the web site Die folgenden akustischen Messungen wurden unter reflexionsarmen Bedingungen bei 1 m Abstand durchgef hrt Farbversionen dieser Diagramme finden Sie auf den entsprechenden Produktseiten der Neumann Website Vous trouverez ci apr s les courbes correspondant aux mesures acoustiques effec tu es en chambre sourde une distance de 1 m tre du moniteur Vous retrou verez ces courbes en couleur dans la section appropri e de notre site Web Las siguientes mediciones acusticas se han realizado bajo condiciones de baja reflexi n a una distancia de 1 m Encontrara versiones a color de estos diagramas en las paginas correspondientes de los productos en la pagina web de Neumann
26. g used to repro duce one signal there is a 9 5 dB acoustical boost for the LFE channel only The LFE channel level should be adjusted at the audio source by 9 5 dB or 0 5 dB so that the reproduction level O or 10 dB is consistent with the main channels NEUMANN Connecting disconnecting the subwoofer to from the mains power supply To connect the KH 810 870 to the mains power supply gt Make sure that the switch MAINS POWER is set to OFF gt Make sure that the switch MAINS VOLTAGE SELECTION 2 is set to the correct position AC 100 120 V if your mains voltage is 100 V or 120 V or AC 220 240 V if your mains voltage is 220 V 230 V or 240 V gt If necessary carry out further steps for a remote switch on switch off see below gt Connect the IEC connector of the supplied mains cable to the IEC mains socket 7 AC 220 240 V MAINS VOLTAGE SELECTION AC 100 120 V MAINS POWER OPTIONAL REMOTE POWER ON OFF AC 100 120 V Power Source gt Connect the mains plug of the mains cable to a suitable wall socket To disconnect the KH 810 870 from the mains power supply Set the switch MAINS POWER 5 to OFF gt Pull the mains plug out of the wall socket Mounting the subwoofer electronics externally If you distribute the subwoofers around the room but wish to have centralized access to the operating controls of the subwoofer electronics or if you set up your subwoofers so
27. gt Send either a 5 1 or a 2 0 signal to the system gt Try to keep the two pairs of loudspeakers connected to the sockets INPUT LEFT INPUT LEFT BACK and INPUT RIGHT INPUT RIGHT BACK at the same distance from the listening position see diagram so that different phase settings are not required Connecting several KH 810 870 To increase the number of subwoofers in a system and to make a Plane Wave Bass Array you can connect the KH 810 870 to additional KH 810 870 subwoofers In such a set up the input signals are only connected to the first subwoofer in the chain The LFE mode and bass manage ment is defined in the first subwoofer Connect your audio source to the sockets INPUT LEFT RIGHT BACK LEFT RIGHT SURROUND LEFT CENTER and RIGHT 8 and to the socket INPUT DIRECT IN LFE SUM 9 of the first subwoofer gt Connect the socket OUTPUT SUM 9 to the analog input socket INPUT DIRECT IN LFE SUM 9 of another KH 810 870 subwoofer Set the rotary switch LFE MODE 9 of all additional subwoofers to DIRECT IN gt SUB ONLY This prevents double filtering of the audio signal gt Make sure that all other settings such as level phase EQ are also set on each of the addi tional subwoofers This information is not daisy chained from the first subwoofer master to the additional subwoofers LFE Mode LFE SUB L R 80 or LFE SUB ONLY 80 or LFE gt SUB ONLY lt 120 or LFE M
28. ic time delay Insert the electronic time delay into the signal path between the sockets OUTPUT of the subwoofer and the input sockets of the loudspeakers gt Compensate for TOF differences using the electronic time delay see the operating instruc tions of the delay Using the bass management gt Set the switch BASS MANAGEMENT 7 to BASS MANAGEMENT The bass management is activated This inserts a 4 order 80 Hz high pass filter into the signal path of the audio outputs OUTPUT LEFT CENTER RIGHT LEFT RIGHT SURROUND and LEFT RIGHT BACK and routes all audio signals below 80 Hz to the subwoofer The LED BASS MANAGEMENT lights up green To exclude the audio channels OUTPUT LEFT RIGHT BACK and OUTPUT LEFT RIGHT SUR ROUND from the bass management Set the switch REAR CH BASS MANAGEMENT 8 to DISABLE If you set the switch BASS MANAGEMENT 7 to DISABLE this also deactivates the bass management of the audio outputs OUTPUT LEFT RIGHT BACK If you deactivate the bass management the audio signal of the audio outputs OUTPUT LEFT CENTER RIGHT LEFT RIGHT SURROUND and LEFT RIGHT BACK is only reproduced by the loudspeakers while the subwoofer only reproduces the signal of the LFE channel Use this function to prevent the low frequency signal components of the main channels being repro duced by the subwoofer gt Set the switch BASS MANAGEMENT 7 to DISABLE Boosting the LFE channel and adju
29. ical engineer At least the following points should be observed The wall should be solid stone brick concrete several layers of gypsum or MDF Ensure a free air flow through the ventilation openings 04 on the rear of the subwoofer see warning note on page 8 or remote locate the subwoofer electronics using the Neumann REK 3 remote electronics kit and an SC cable available in different lengths see Accessories on page 28 Using one or several subwoofers Use if your room does not offer sufficient space for several subwoofers if you prefer an easier installation of if you need to move left and right along the mixing console or if there are several listening positions along a large your system format mixing console if you require a higher output power or less distortion with the same output power to suppress lateral modes or cross modes in the room by means of a Plane Wave Bass Array PWBAT if many smaller cabinets are easier to position than one large cabinet To reduce low frequency distortion the uncalibrated output level of your subwoofer should always be higher than the output level of your loudspeakers We recommend using arrays with several subwoofers in which case the uncalibrated maximum output level of the subwoofer array should also be higher than the maximum output level of all the loudspeakers in the system The subwoofers can then be calibrated to a lower out
30. ling sounds in your ears You have the impression even for a short time only that you can no longer hear high fre quencies temporary threshold shift WARNING Interference due to magnetic fields This product generates stronger permanent magnetic fields that can interfere with cardiac pacemakers and implanted defibrillators ICDs gt Always maintain a distance of at least 4 10 cm between the subwoofer and the cardiac pacemaker or implanted defibrillator Intended use of the product includes having read this operating manual especially the chapter Important safety instructions using the product within the operating conditions and limitations described in this operat ing manual Improper use means using the product other than as described in this operating manual or under operating conditions which differ from those described herein This will invalidate the guarantee KH 810 870 3 NEUMANN gt 4 KH 810 870 The KH 810 870 subwoofer Thank you for purchasing a Neumann subwoofer Neumann subwoofers are designed to com plement Neumann s extensive range of monitors They can be used in music broadcast and post production studios for tracking mixing and mastering They can be positioned next to a wall or flush mounted into a wall and can be mixed freely in multi channel systems with other loudspeakers and subwoofers from the Neumann Studio Monitor Systems range The built in
31. ment to improve the in situ response of the subwoofer The acoustical controls settings depend on the subwoofer s location and will probably be different for the same subwoofer type installed in different locations in the same room Moving the cabinet small distances 50 cm 20 can dramatically change the response therefore resulting in different acoustical control settings Graphs of acoustical measurements conducted in anechoic conditions at a distance 1 m can be found at the end of this operating manual Color versions of these graphs can be found on the corresponding product pages at www neumann com KH 810 870 31 NEUMANN Analog output card Crossover Driver s LFE channel Power amplifier s Protection system Remote switch on switch off The analog output card has seven channels of 4th order 80 Hz high pass filtering and a level control for each of these channels Following this there are seven electronically balanced output stages whose signal is present at the sockets OUTPUT LEFT RIGHT BACK LEFT RIGHT SURROUND LEFT CENTER and RIGHT All outputs main channels and sum have protective circuits to avoid power on off noises the outputs switch on after a short delay when mains power is applied and mute instanta neously when mains power is removed If you select the corresponding mode there is also 80 Hz high pass filtering and summing of the LFE channel to the left and right outputs more details
32. nd of its operational lifetime by taking it to your local collection point or recycling center for such equipment D lt C CE Declaration of Conformity RoHS 2011 65 EU Low Voltage Directive 2006 95 EC EMC Directive 2004 108 EC The declaration is available on the product page at www neumann com Certified by Ge Audio Video and Similar Electronic Apparatus Safety Requirements CAN CSA C22 2 No cus 60065 03 Incl AM1 and UL Std No 60065 2007 Trademarks Neumann is a registered trademark of Georg Neumann GmbH The following are trademarks of Georg Neumann GmbH Plane Wave Bass Array and PWBA Other company product or service names mentioned in this operating manual may be the trademarks service marks or registered trademarks of their respective owners FCC This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation This class B digital apparatus complies with the Canadian ICES 003 Changes or modifications made to this equipment not expressly approved by Neumann may void the FCC authorization to operate this equipment KH 810 870 29 gt gt gt NEUMANN BERLIN Technical information amp glossary Absolute level Acoustical axis Acoustical controls In Europe th
33. ng 80 120 fullrange LFE gain O dB 10 dB switchable Gain control 2 12 dB 26 KH 810 870 NEUMANN BERLIN Displays KH 870 ICE Switch on indicator red LED lights up and remote control logo Limit clip red LED flashing and remote control logo Bass management active green LED lights up Product properties KH 870 KH 810 Mains voltage 220 240 or 100 120 V AC switchable 50 60 Hz Power consumption idle 25 W 20 W Power consumption full output AC 550 W 290 W Dimensions H x W x D 735 x 330 x 645 mm 360 x 330 x 645 mm Internal net volume external volume 86 0 1 156 0 41 5 76 6 Weight 47 1 kg 103 6 lbs 26 0 kg 57 2 lbs Driver s magnetically shielded magnetically shielded 2 x 265 mm 2 x 10 1 x 265 mm 1 x 10 Mounting points mounting flange 38 mm 1 5 on upper side Cabinet surface finish color painted wood MDF anthracite RAL 7021 Driver protection metal grille F operating conditions T Ambient temperature 10 C to 40 C 50 F to 104 F Relative humidity max 90 non condensing Transport storage conditions s CMM Ambient temperature 259 to 70 C 13 F to 158 F Relative humidity max 90 non condensing Incomptiance with Europe C EMC EN 55103 1 2 Electromagnetic Environment Class E4 Safety EN 60065 USA 47 CFR 15 subpart B Canada ICES 003 Acoustical measurements block diagram and pin assignment Additional technical data such
34. ode DIRECT IN gt SUB ONLY DIRECT IN SUB ONLY A Internal Subwoofer Signal or Driver Cable DC nn when Remote o o Electronics Kit REK2 is used E 2222 2 22 KH 810 870 13 NEUMANN 14 KH 810 870 Using subwoofers in a 4 way system To build a larger system gt Install the subwoofers and loudspeakers like columns INPUT INPUT gt INPUT gt 8B OUTPUT LEFT OUTPUT CENTER OUTPUT RIGHT T 5 m 7 ro W re E m INPUT LEF Left Center Right LFE INPUT CENTEI FE INPUT RIGH gt Connect the channels Left Center Right of your audio source to the subwoofers according to their physical position see diagram above Connect the channel Left to the socket INPUT LEFT 8 of the left subwoofer connect the channel Center to the socket INPUT CENTER 8 of the middle subwoofer and connect the channel Right to the socket INPUT RIGHT 8 of the right subwoofer gt Use a Y cable not supplied to connect the LFE channel of the audio source to the sockets INPUT DIRECT IN LFE SUM 9 of all three subwoofers To tilt the loudspeakers you can use Neumann mounting hardware such as for example the LH 36 The subwoofers should be acoustically calibrated so that they smoothly extend the bass response of their respective main loudspeaker As three subwoofers are bein
35. of the LFE channel 24 KH 810 870 Setting of the switch SUBWOOFER GAIN OUTPUT LEVEL Gi O dB No muting Setting of the switch BASS MANAGEMENT 7 Setting of the switch REAR CH BASS MANAGEMENT Setting of the switch LFE GAIN NEUMANN Cleaning and maintaining the subwoofer Liquids entering the product can cause a short circuit in the electronics and damage or even destroy the product gt Keep all liquids away from the product gt Before cleaning disconnect the product from the mains power supply see page 15 gt Use a soft dry and lint free cloth to clean the product Troubleshooting There is hum or buzz coming from the KH 810 870 when an audio cable is connected The bass management of the audio outputs OUTPUT LEFT RIGHT BACK 49 does not seem to work even though the switch REAR CH BASS MANAGE MENT 8 is set to the left There is a sudden reduction of the subwoofer s output level the LED POWER ON 5 flashes slowly the output level is reduced by 6 dB The level controls on the rear of the subwoofer behave different than expected The LED POWER ON 5 goes off in time with high energy low frequency signals A cable is defective the cabling is bad there is ground loop in the instal lation or the level of the audio source is too low The switch BASS MANAGEMENT 17 is set to DISABLE This also deactivates the bass management of the audio outputs OUTPUT LEFT RIGHT BACK
36. om the socket REMOTE CONTROL AND RS 232 2 The system output level continues at the level value last send to the subwoofer To reset the system output level to O dB Switch the subwoofer off and on again or Set the switch VOLUME CONTROL 9 to DISABLE KH 810 870 23 NEUMANN Resetting the settings of the KH 810 870 If you control the KH 810 870 using the RS 232 protocol you can change settings that you cannot make using the switches on the rear of the KH 810 870 settings that deviate from the actual position of the switches of the KH 810 870 To reset the KH 810 870 to the factory default settings or to reset the settings of the switches on the rear of the subwoofer gt Switch the subwoofer off and on again by setting the switch MAINS POWER 5 to OFF and then to ON gt Within 5 seconds after switch on move the switch REAR CH BASS MANAGEMENT 8 at least three times to the left and right If resetting was successful the LEDs POWER ON 45 and BASS MANAGEMENT 6 alternately flash for approx 2 seconds and the subwoofer then restarts The following settings are reset Output level of the subwoofer Level of all or individual signals at the sockets OUTPUT LEFT RIGHT BACK LEFT RIGHT SURROUND LEFT CENTER amp RIGHT 4D Muting of all and or individual channels Activation deactivation of the bass management Activation deactivation of the rear channel bass management Gain
37. ound pressure level at the listening position at the cut off frequency of 80 Hz 180 phase shift between subwoofer and loudspeaker maximum level cancelation Set the switch SUBWOOFER PHASE to the opposite position The phase shift between loudspeaker and subwoofer is now O Check your subwoofer s sound pressure level again and if necessary readjust it so that it corresponds to the sound pressure level of the loudspeakers Your system is now completely acoustically calibrated Calibration using Neumann test signals gt gt Download the Neumann test signals and the instructions for use PDF file in English from the KH 810 870 product page at www neumann com Follow the steps described there Calibration using music signals and an 80 Hz test signal gt gt Adjust the settings for the sound pressure level and the frequency response as described above Calibrate the acoustical phase using the built in 80 Hz test signal generator Check the set tings of the sound pressure level and frequency response by means of music signals you are familiar with e Connect the left front loudspeaker to the socket OUTPUT LEFT Set the switch BASS MANAGEMENT 47 to BASS MANAGEMENT Set the switch TEST SIGNAL to ON An 80 Hz test signal is internally applied to the audio input INPUT LEFT 8 and is repro duced at the socket OUTPUT LEFT and by the subwoofer Set the rotary switch SUBWOOFER
38. pagation de groupe Retardo de grupo 0 05 Da ua 1 2 5 10kHz KH 810 Maximum SPL at 1 m 1 and 3 Maximaler SPL bei 1 m 1 und 3 Niveau SPL maximal 1 m 1 et 3 SPL m ximo a 1 m 1 y 3 KH 810 870 III F rm m V 20 rm D ES m m NEUMANN BERLIN IV KH 810 KH 870 Acoustical controls Akustikregler Acoustical Controls Acoustical Controls Low Cut acoustical control Parametric Equalizer Akustikregler Low Cut Parametrischer Equalizer Action du potentiom tre Low Cut Action de l galiseur param trique Control de corte de bajos Low Cut Control del ecualizador param trico dB dB E B _ 7 e 0 0 5 ME IN 10 10 15 15 0 005 0 02 0 1 0 5 1kHz 0 005 0 02 0 1 0 5 1kHz LFE channel electrical response Elektrischer Frequenzgang LFE Kanal Courbe de r ponse lectrique du canal LFE Respuesta el ctrica del canal LFE 0 02 0 1 05 14 2 5 10kHz 03 13 544943 A02 PRINTED IN GERMANY
39. pose this apparatus to rain or moisture Do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids such as vases are placed on the equipment The mains plug of the power supply cord shall remain readily accessible the product CAUTION ANEREN DO NOT OPEN The symbols on this label have the following meaning sure that may be of sufficient magnitude to constitute a risk of fire or Presence of uninsulated dangerous voltage within the product s enclo 4 electric shock Never open the product or remove the grilles fitted to the product as CAUTION there is a risk of electric shock There are no user serviceable parts inside Refer servicing to your Neumann service partner DO NOT OPEN Read and follow the safety and operating instructions contained in the operating manual Installation High sound pressure levels Magnetic fields Intended use Ensure that the room in which you use this product is wired in accordance with the local electrical code and checked by a qualified inspector Only use the product indoors Do not install the product in hot humid or excessively dusty locations in direct sunlight or in locations where it is exposed to externally generated vibrations Do not place burning objects e g candles on top of or near the product If condensation has formed on the product e g because it was moved from a cold environ ment to a warm one allow the product
40. put level resulting in lower distortion and correspondingly cleaner low frequency reproduction For information on building a balanced system please refer to the Product Selection Guide at www neumann com KH 810 870 9 NEUMANN Utilizing the acoustical gain 10 KH 810 870 Positioning the subwoofers Regardless of whether you are setting up one or several subwoofers gt Always ensure that the distance between the wall behind the subwoofer and the sub woofer s front is less than 0 8 m wall If you are setting up one subwoofer gt Position the subwoofer against the front wall slightly left or right of the middle of the front wall and between the left and right loudspeakers If you are setting up several subwoofers as a Plane Wave Bass Array PWBA gt Use two to four subwoofers for smaller rooms and three to four subwoofers for larger rooms gt Set up the subwoofers along the front wall within half a wavelength of each other The max imum spacing of the subwoofer cabinets is determined by the setting of the LFE mode see page 20 LFE SUB L R gt 80 approx 2 m 6 6 LFE gt SUB ONLY lt 80 approx 2 m 6 6 LFE gt SUB ONLY lt 120 approx 1 4 m 4 6 DIRECT IN gt SUB ONLY approx 1 4 m 4 6 If you observe the stated spacing the subwoofers form a cylindrical source and generate a plane wave down the room a so called Plane Wave Bass Array PWBA The PWBA
41. r the level controls WARNING Danger of hearing damage due to sudden high sound pressure levels If with an audio signal present you remove the Neumann NRC 1 remote control while the switch VOLUME CONTROL 9 is set to VOLUME CONTROL or you set the switch VOLUME CON TROL 19 to DISABLE while the Neumann NRC 1 remote control is connected the system output level is immediately set to O dB This can create sudden very high sound pressure levels which can damage your hearing gt Always lower the output level of the audio source before removing a connected Neumann NRC 1 remote control or with the remote control connected setting the switch VOLUME CONTROL to DISABLE To be able to use the remote control for adjusting the level controls you have to activate this function Set the switch VOLUME CONTROL 9 to ACTIVE You can now remote control the system output level To deactivate the remote control for the level controls or to remove the remote control cable from the socket REMOTE CONTROL AND RS 232 2 If you are using the Neumann NRC 1 remote control gt First make sure that no high level audio signals are present gt Set the switch VOLUME VOLUME CONTROL 49 to DISABLE The system output level is automatically reset to O dB and you can now remove the remote control cable from the socket REMOTE CONTROL AND RS 232 2 If you are using an RS 232 control gt Remove the cable of the RS 232 control fr
42. reduces stationary waves between the side walls improves the bass reproduction and suppresses lateral room resonances For examples of set up positions and distances please refer to the supplied Getting Started Quickly supplement You can correct excessive low frequency energy in the room using the potentiometer SUBWOOFER GAIN INPUT GAIN and the switch SUBWOOFER GAIN OUTPUT LEVEL cf page 31 If you set up several subwoofers you can utilize their mutual coupling to achieve an acoustical gain The following acoustical gains are possible 0 0 dB 6 0 dB 9 5 dB 12 0 dB HE GLO NA P Positioning and orienting subwoofers and loudspeakers Subwoofers are omni directional in their typical pass band as the generated wavelength is long compared to the surface producing the sound therefore it does not matter in which direc tion the subwoofer is oriented when placed in the listening environment NEUMANN For your loudspeakers however an accurate positioning and orientation is vital gt Position your loudspeakers as follows Position and orientation 2 0 stereo 30 5 1 ITU R BS 775 1 0 30 110 10 center front left right surround left right ANSI SMPTE 202M 0 22 5 arrays to the surround left and to the surround right plus optional subwoofer s 6 1 as 5 1 systems plus 180 back center Thal ONES OE OE OL center front left right side left right back left right For detailed informa
43. response at the listening position using your acoustical measurement system In case of acoustical loading in the low frequency range at the listening position turn the potentiometer LOW CUT to the left This reduces the output level of the subwoofer towards lower frequencies Use the parametric equalizer to compensate for further nonlinearities in the frequency response below 120 Hz caused by room modes Measure the subwoofer s sound pressure level at the listening position Adjust the sound pressure level of the subwoofer so that the level of the frequency response of the subwoofer below 80 Hz corresponds to the level of the frequency response of the loudspeakers above 80 Hz To do so use the potentiometer SUBWOOFER GAIN INPUT GAIN and the switch SUBWOOFER GAIN OUTPUT LEVEL C Make sure that the input signal is not too high Set the phase using the rotary switch SUBWOOFER PHASE 3 Values from 180 to 315 can be obtained by setting the switch SUBWOOFER PHASE 3 to 180 and by adding the set value of the rotary switch SUBWOOFER PHASE Example To obtain a phase shift of 270 set the switch SUBWOOFER PHASE to 180 and the rotary switch SUBWOOFER PHASE 4 to 90 Set the rotary switch SUBWOOFER PHASE 4 in combination with the switch SUBWOOFER PHASE to values of 0 45 90 135 180 225 270 and 315 until you have found the setting that gives the lowest s
44. s LFE SUM 2 2 Note 10 dB LFE Gain setting has no effect when LFE MODE switch is set to DIRECT IN gt SUB ONLY Pin assignment of the XLR socket Buchsenbelegung XLR Brochage de la prise XLR Asignaci n de la hembra XLR Audio ground Audio Erdung Masse audio Toma de tierra de audio Signal Signal Signal Se al Signal Signal Signal Se al Pin assignment of the REMOTE CONTROL AND RS 232 socket Anschlussbelegung der Buchse REMOTE CONTROL AND RS 232 Brochage de la prise REMOTE CONTROL AND RS 232 Asignati n de conexiones de la hembra REMOTE CONTROL AND RS 232 Supply voltage 3 3 V Bypass bass management AND RS 232 Volume control 1 LOGO voltage 2 GND 3 RS 232 TX 4 RS 232 RX 5 6 7 8 10 dB LFE gain RS 232 data connection KH 810 870 ES gt NEUMANN D E9 II KH 810 KH 870 m 2 rm BERL LIN The PDF file 7 1 High Definition Bass Manager Remote Control Wiring Diagram contains a wiring diagram for making your own hardware remote control for the KH 810 870 You can download it from the KH 810 870 product page at www neumann com In der PDF Datei 7 1 High Definition Bass Manager Remote Control Wiring Dia gram finden Sie einen Schaltplan mit dessen Hilfe Sie eine individuelle Fernbe dienung fiir den KH 810 870 anfertigen k nnen Sie finden die PDF Datei auf der KH 810 870 Produktseite unter www neumann com Le fichi
45. sting the LFE mode If you are using three subwoofers in a 4 way system see page 14 the acoustical level of the LFE signal is boosted by 9 5 dB In this case it is sufficient to increase the level of the audio source by 0 5 dB to obtain an LFE gain of 10 dB You can boost the level of the LFE channel by 10 dB This boost can be performed in the moni toring matrix console or external in a decoder output stage surround sound processor or DVD Blu ray disk player or in the 7 1 High Definition Bass Management System of the KH 810 870 gt First check if a 10 dB gain has already been applied somewhere else in the signal path If this is the case gt Make sure that the switch LFE GAIN is set to O dB NEUMANN Adjusting the LFE mode If the boost of the LFE channel is to be performed in the 7 1 Channel High Definition Bass Management System of your subwoofer gt Make sure that the rotary switch LFE MODE is not set to DIRECT IN gt SUB ONLY Set the switch LFE GAIN 68 to 10 dB The following settings only apply to the audio input INPUT DIRECT IN LFE SUM gt Set the rotary switch LFE MODE 9 to the desired position ss oas MIN LFE 1 LFE SUB L R 80 L No o ied LFE SUB L R 80 LFE gt SUB ONLY lt 80 ie a i LFE gt SUB ONLY 120 LFE MODE ALFE SUB lt 80 N DIRECT IN SUB ONLY 0 dB LFE GAIN ONLY SUB
46. switches the subwoofer s electronics completely on and off so the startup time is subject to the same on off muting delays as if the subwoofer had been switched on and off using the switch MAINS POWER 6 32 KH 810 870 NEUMANN RS 232 control Volume control If the control equipment outputs RS 232 data on D sub connectors an RS 232 to CAT5 cable is required Only pins 3 4 and 5 should be connected Pins 4 and 5 should be crossed over i e TX con nects to RX and vice versa Un ITI my D Sub Pin CAT 5 Pin 2 RX gt 4 TX 3 TX gt 5 RX 5 GND gt 3 GND Do not connect shield RS 232 D sub to CAT5 adapter If the control equipment has a USB connector for example a computer a USB to RS 232 adapter is required these are available from most large computer shops Once the USB is converted to RS 232 an RS 232 to CAT5 adapter is required to connect to the subwoofer see diagram above Only connect the three pins indicated in the diagram otherwise damage may occur to the USB to RS 232 adapter The VOL stages are located at the main channel outputs of the 7 1 High Definition Bass Manager and the subwoofer output As a result they can be used for controlling the replay level of the entire sys tem or for remotely trimming individual loudspeaker levels Consequently they cannot be used to replicate signal SO
47. ternal bass management is used e g surround sound processors or DVD Blu ray disk players the output is often labeled Subwoofer Additionally this mode is useful for detecting higher frequency signal components up to 300 Hz in the LFE channel that should be avoided during mixing Please note that the LFE gain is always O dB in this mode KH 810 870 21 NEUMANN Activating ground lift If there is humming or buzzing noise coming from the subwoofer first search for the cause of the noise gt Disconnect all input and output signal cables from the subwoofer If the noise goes away it is probably coming from the audio source or source cabling It might be possible to eliminate the noise by disconnecting the ground from the input signals activating ground lift To activate ground lift gt Reconnect the signal cables and set the switch INPUT GROUND LIFT 43 to INPUT GROUND LIFT This internally disconnects pin 1 of all 8 XLR sockets from the subwoofer electronics chassis ground see table on page 11 INPUT GROUND uer MMM rina connecteo For safety reasons the electronics chassis ground is always connected to the mains power earth pin Even when ground lift is activated the pins 1 of all audio inputs remain electronically connected to each each other Remote controlling the system Using the NRC1 Using a Neumann NRC 1 remote control see page 16 you can remote control the following remote
48. that easy access to the subwoofer electronics is not possible you can mount the latter externally gt Use the Neumann REK 3 remote electronics kit together with an SC cable available in differ ent lengths see Accessories on page 28 gt Proceed as described in the operating manual of the 3 KH 810 870 15 NEUMANN OPTIONAL REMOTE POWER ON OFF REMOTE CONTROL AND RS 232 16 KH 810 870 Preparing the subwoofer for remote on off switching gt Have your Neumann service partner enable the remote on off switching function inside the subwoofer gt Use a Euroblock connector not supplied to connect a two core cable 12 V DC to the socket OPTIONAL REMOTE POWER ON OFF socket pin assignment shown on the left i For further information on remotely switching the subwoofer on off please refer to page 17 Preparing the subwoofer for remote control RS 232 control CAUTION Material damage due to improper use of cables If you insert a network cable that is connected to the KH 810 870 into a network socket the network device can be damaged If network signals are transmitted to the KH 810 870 via a network cable the KH 810 870 can be damaged gt Only connect the KH 810 870 to Neumann remote controls or devices that deliver a RS 232 signal using a high quality Neumann RC CAT5 cable see below Do not use a crossover type of CAT5 cable You can remote control the KH 810 870
49. tion on the positioning and orientation of your loudspeakers please refer to the operating manuals of the loudspeakers If your subwoofers cannot be placed at the same distance from the listening position as the loudspeakers time of flight differences will occur gt Avoid distance differences of gt 2 m 6 6 gt Compensate for time of flight differences as described in the chapter Calibrating the phase on page 19 Connecting the subwoofer Connecting the subwoofer to an audio source gt Use balanced XLR cables to connect the corresponding sockets INPUT 8 of the KH 810 870 to the audio source Connecting Use an XLR adapter not supplied to connect unbalanced cables e g RCA cables Use the unbalanced following wiring if you want to make your own XLR adapter ET in E Output RCA Input XLR M 1 Audio ground E 3 Signal The level delivered by devices with RCA outputs 10 dBV is usually less than the studio level 4 dBu gt If necessary use active unbalanced to balanced converters in order to be able to connect devices with unbalanced signals KH 810 870 11 NEUMANN BERLIN Connecting loudspeakers to the subwoofer For a simplified representation the following connection examples show small loudspeakers in combination with the KH 810 subwoofer Each of the examples only shows one possible combination of loudspeakers and subwoofers For information on building a balanced system pl
50. to as 1 when describing for example a 5 1 system The designation LFE channel always refers to the source and not to the loudspeakers The high efficiency power amplifiers of the KH 810 870 minimize power dissipation and are run in bridged mode to minimize distortion An extensive protection system prevents damage to the subwoofer if high signal levels are applied to the input The LED POWER ON 5 flashes when the protection system is active In this case reduce the input signal level If this happens regularly use a larger subwoofer with a higher SPL output or add more subwoofers to the system to increase the LF headroom The protection system consists of thermal and peak limiters for the amplifier s and thermal modeling of the driver s The protection system is not a compressor it is designed to protect the subwoofer from damage The protection system cannot protect against sustained abuse of the loudspeaker sys tem i e playing the subwoofer for long periods of time with the LED POWER ON 5 flashing Please avoid consistent abuse of the subwoofer to not affect the long service life of the product A 12 V DC trigger voltage allows you to remotely switch the subwoofer on and off without having to use the switch MAINS POWER 5 This can be useful in a large installation where the whole room is powered up using a single switch The devices are switched on using a time delay to prevent high starting current peaks The trigger voltage
51. via the Neumann NRC 1 remote control see Accesso ries on page 28 or control it via an RS 232 signal For more information please refer to the operating manuals of the remote controls and to page 22 gt Connect the NRC 1 remote control or the RS 232 control to the socket REMOTE CONTROL AND RS 232 2 Use Neumann RC cables with Neutrik EtherCon connectors see Accessories on page 28 These cables are available in different lengths have been designed for heavy duty use and provide maximum freedom of movement The pin assignment of the socket REMOTE CONTROL AND RS 232 2 can be found at the end of this operating manual To remote control more than one subwoofer an SEA 1 is required see Accessories on page 28 This device duplicates control signals across multiple subwoofers For more information see the SEA 1 operating manual NEUMANN On off switching using the switch MAINS POWER Remote on off switching Using the KH 810 870 Switching the subwoofer on off You can switch the KH 810 870 on and off using the switch MAINS POWER 5 or remotely MAINS POWER OPTIONAL gt ON OFF Set the switch MAINS POWER 5 to e ON to switch the subwoofer on The LED POWER ON 15 flashes for seconds during which the subwoofer is muted see below The LED POWER ON 5 then lights up red OFF to switch the subwoofer off The LED POWER ON 5 goes off lt There is a thr
52. zed or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Always connect to a mains socket outlet with a protective earthing connector Protect the power cord from being walked on or pinched particularly at plugs conve nience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufacturer Use only with the cart stand tripod bracket or table specified by the manu facturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the appara tus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus when the apparatus has been exposed to rain or moisture does not operate normally or has been dropped To completely disconnect this apparatus from the AC mains disconnect the power supply cord plug from the AC receptacle WARNING To reduce the risk of fire or electric shock do not ex
Download Pdf Manuals
Related Search