Turbosound LMS-D4 User's Manual
Contents
1. Ch B Right LM S D4 user manual user manual LMS D4 Operating the LMS D4 With the unit mounted in a rack or cabinet securely plug in all connections and check especially that the Low LF or Bass and High HF or Top outputs are connected to the correct amplifiers It is good practice to switch on the LMS D4 before powering up the amplifiers When you plug the LMS D4 into the mains power supply the unit will power up and the LCD display indicates the last system loaded the unit will be configured as it was when it was last turned off The current software version is also displayed for 10 seconds at start up The red Mute LED will also be illuminated as the unit powers up by default with all outputs muted Menu Structure The structure includes three sub menus Load a Xover Xover Setup and Utilities Their operation is described in the next paragraphs To access menus press the MENU key and then use BACK and WEXT to navigate Finally press ENTER when the desired sub menu appears on the display System Selection This menu allows the selection of a particular loudspeaker system and configures the LMS D4 accordingly It sets equalisation crossovers and other parameters to optimal default values and the factory presets To display and go through the available systems use the SCROLL rotary encoder The system names will appear on the bottom line of the display Once the desired configuration2. Turbosound LMS D4 DIGITAL LOUDSPEAKER MANAGEMENT SYSTEM USER MANUAL Turbosound Ltd Star Road Partridge Green West Sussex RH13 8RY England Tel 44 0 1403 711447 Fax 44 0 1403 710155 w eb ww w turbosound com user manual LMS D4 CONTENTS Important Safety InformatlOnis 2 caccei reete ee ieee alee lela 3 Unpacking the LMS DA 4 pingele UGE ON m 5 Le re JU o Om ao ee ee ee ee 5 Front Panel FUNCHONS iicccssccscscecccsccseciesecsscaascstcastecacnsscascenactadeaatcanescsdaansaacssapactisecncscantcadesscteattsseasedaads 6 Real Panel FUMCHOMS tii sicicscctaci E 7 Output COMMOUFALIONS aers er aae ar arae E nanan hen enini nen dern ar ds 8 Operating the EMS D4 niri n er cad a a e E da Rb a RB ka er aee eun 9 Crossovel Settirigs cii dnd dvd ad tad aded A a NICA a UE Md A EIL AG ME adc 11 S SCI CAG ONS es sacs a E A Ot 15 Irun C 16 ADpehdixcA eec DETUR EVE 17 LM S D4 user manual Page 2 user manual LMS D4 CE An example of this equipment has been tested and found to comply with the following European and international Standards for Electromagnetic Compatibility and Electrical Safety Conducted and Absorbed Emissions EU EN55103 1996 Harmonic Current Emisions EU EN61000 3 2 Voltage Fluctuati
3. operates on The values displayed in dBu refer to signal level at the outputs of the unit Follow these steps in order to correctly set limiters for your speaker system 1 Determine the program power handling of the Turbosound loudspeaker or HF LF section as appropriate or from the engineering data sheet or user manual for that product or from the label on the rear of the cabinet 2 Calculate the required limiter voltage using the formula V vPR where V is the limiter voltage setting and P is the program power rating of the loudspeaker and R is the nominal impedance of the loudspeaker LMS D4 user manual Page 12 user manual LMS D4 3 Scroll to set the nearest lower voltage to the calculated value in the limiter screen for that loudspeaker model or frequency band as appropriate and press ENTER Refer to the limiter voltage lookup table in Appendix A for a range of approximate conversion values In addition to those values the limiters can also be defeated OFF displayed on the screen Please note that this setting should be used only if the amplifiers already have internal limiters or soft clipping circuitry 5 Channel Gain OP1 3 Sub Gain 4 0 dB Set the gain of the specified output channel relative to the other channel s Available values are from 46 0 to 19 4 dB in 0 2 dB steps Note with limiters and amplifier gain set correctly OdB relative gain will give maximum output 6 Polarity
4. OP1 3 Sub Polarity Normal Define the polarity of the specified output channel The value can be normal or inverted 7 Delay OP1 3 Sub Delay 0 000 ms LM S D4 user manual Page 13 user manual LMS D4 Set the signal delay on the specified output channel The delays can be adjusted in 20 83 uS increments with a maximum value of 20 7 ms 7 1 metres in stereo two way configurations and 42 ms 14 4 metres in mono three way configurations These delays are provided their range is large enough to align the driver components in the time domain including separate sub bass cabinets but will not replace a dedicated delay line unit in applications such as distributed systems Please also note that as with other similar digital processing units the values displayed are relative and do not take into account the basic processing delay of the unit which is approximately 0 4ms When adjusting the delay on bi amped loudspeakers it is important to ensure the difference between channels remains fixed so that the HF and LF drivers stay aligned 8 Store Setup Store Setup The settings of this particular setup can be saved so that when it is next recalled the user edited value will return to their preferred settings LMS D4 user manual Page 14 user manual LMS D4 Specifications Inputs Impedance Outputs Min Load Max Level Frequency Resp Dynamic Range Distortion Maximum Delay Output gai
5. appears confirm the selection by pressing ENTER Please note that this will cause the outputs to be automatically muted this is to limit accidental change that could endanger the loudspeaker components After a system is loaded the limiter settings must be adjusted since the default setting is OFF Xover Setup This menu allows you to change the settings of a number of parameters also refered to as user controls They are detailed in the next section Having entered the Xover Setup menu the information displayed will generally include three fields 1 The top row the output channel s being refered to 2 At the left hand side of the bottom row the name of the parameter being edited 3 At the right hand side of the bottom row the value of the parameter As an exception when the control is not channel related its description will appear on the top row e g for Bass Boost LM S D4 user manual Page 9 user manual LMS D4 Use the WEXT and BACK keys to navigate through the accessible user controls Then when the desired control appears on the display use the the SCROLL button to change the value as displayed on the bottom row IMPORTANT Check that the limiter and amplifier settings are correct and that mixer levels are minimised before unmuting the LMS D4 Utilities This menu gives access to three features as indicated below Lock unlock Locking the unit will prevent any c
6. hange of the system in use as well as editing any of the user controls To lock the unit a password of 3 digits has to be entered Use the NEXT and BACK keys to move from one digit to the other and the SCROLL button to edit each of the three values Finally press the ENTER key To unlock the unit simply follow the same procedure Clear User Setups This stores the factory preset default values for the system currently selected As a result any change previously made to the user controls values will be cancelled Download from PC A standard 9 pin RS 232 type connector is provided to facilitate the future implementation of software downloads and future upgrades To download new flash memory data this option must be enabled LM S D4 user manual Page 10 user manual LMS D4 CROSSOVER SETTINGS 1 Input Gain INPUT GAIN Gain 0 0dB The input gain sets the attenuation of the signal before any processing is applied The value ranges from 40dB to 6dB in 0 5dB steps In stereo mode the gain value applies to both inputs 2 LF Bass Boost BASS BOOST Trim 0 0dB Where implemented the range of values are from 6 0 dB to 6 0 dB in 0 5 dB steps The corner frequency is fixed and optimised for each system and typically it is around 100Hz The Bass Boost control allows for an easy adjustment of the response to match variations in the acoustic environment Generally the 0 dB setting will pro
7. ll TURBOSOUND products are carefully engineered for world class performance and reliability If you would like further information about this or any other TURBOSOUND product please contact us We look forward to helping you in the near future Unpacking the LMS D4 After unpacking the unit please check carefully for damage If damage is found please notify the carrier concerned at once You the consignee must instigate any claim Please retain all packaging in case of future re shipment LMS D4 user manual Page 4 user manual LMS D4 Introduction The LMS D4 is a compact and powerful DSP based audio processing unit designed for use with particular Turbosound loudspeaker systems and associated bass enclosures combining the functions of multiple conventional products in a compact 1U high 19 rack unit To achieve this the LMS D4 has 2 inputs and 4 outputs which are configured by different system presets to allow two basic modes stereo 2 way and mono 3 way The unit is designed to provide specific equalisation and crossover points aimed at optimising the performance of these Turbosound loudspeaker systems In addition limiters delays up to the equivalent of 14 metres gain polarity and bass trim controls are accessible to the user in order to match specific operation environments The LMS D4 is designed for quick setup and adjustment via easy to use front panel controls Features e The LMS D4 provides exceptional audi
8. n Bass Boost Limiters Display Input LED Limiters LED Connectors Inputs Outputs Mains Power Consumption Weight Size Two electronically balanced nominally Odb 10 kOhm Four electronically balanced nominally Odb 600 Ohm 19dBu into 2kOhm load 0 5dB 20Hz 20kHz 110dB typ 20Hz 20kHz unweighted 0 0296 9 1kHz 18dBu up to 42 ms increment 21 us adjustable 15dB to 15dB in 0 5dB steps and mute shelf adjustable 6dB in 0 5dB steps threshold adjustable over an equivalent voltage range of 30 dB range in 0 5dB steps 2 x 20 character backlit LCD Two per input signal at 24dBu and digital clip One per output 3 pin female XLR 3 pin male XLR 3 pin IEC 100 to 240V 10 50 60Hz 6 5 watts 2 3 kg net 3 5 kg shipping 1 75 1U x 19 x 6 4 44mm x 482mm x 162 mm excluding connectors Due to continuing product improvement the above specifications are subject to change LM S D4 user manual Page 15 user manual LMS D4 WARRANTY This product is warranted against defects in components and workmanship only for a period of one year from the date of shipment to the end user During the warranty period TURBOSOUND will at its discretion either repair or replace products which prove to be defective provided that the product is returned shipping prepaid to an authorised TURBOSOUND service facility Defects caused by unauthorised modifications misuse negligence act of God or accident or any
9. o quality with carefully optimised processing and high performance converters for a full 2108dB dynamic range high sampling rate and minimal filtering Audio grade capacitors are used in the analogue signal path e Bass boost filter allowing an easy adjustment of the response to match variations in acoustic environment such as half space operation for floor monitor use coupling of cabinets in arrays or room resonances Front panel rotary encoder providing a familiar and easy to use control format with all filter information displayed simultaneously on a backlit LCD display e Delay of up to 42mS can be set for each output mono or each pair of outputs stereo LM S D4 user manual Page 5 user manual LMS D4 10 Front Panel Functions a o LMS D4 FE wer US f U TER LCD Display Shows menu options output information and the parameters being adjusted Menu Key Activates the main menu on the LCD display and toggles between menu options and system name display Different menus are selected by pressing the BACK and NEXT keys Next Key Moves forwards through the list of available menus or options Back Key Moves backwards through the list of available menus or options Enter Key Enters the chosen menu and confirms menu selections Scroll knob The rotary encoder allows the current parameter displayed on the LCD screen to be adjusted and scrolls through the available list of prese
10. ons Flicker EU EN61000 3 3 Generic Immunity EU EN50082 1 1997 Electrical Safety EU EN60065 1998 Electrical Safety US UL6500 2000 Electrical Safety Canada CSA E6500 1999 Important Safety Information Please read carefully and keep the following instructions and safety information Heed all warnings and follow all instructions Do not remove covers There are no user serviceable parts inside please refer servicing to qualified service personnel This equipment must be earthed Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufacturer Servicing is required when the apparatus has been damaged in any way such as the power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN DO NOT EXPOSE TO RAIN OR MOISTURE ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS ENLEVER NE PAS EXPOSER A LA PLUIE NI A L HUMIDITE LM S D4 user manual Page 3 user manual LMS D4 Thanks Thank you for choosing the TURBOSOUND LMS D4 for your application Please spare a little time to study the contents of this manual so that you obtain the best possible performance from this unit A
11. tors are provided for each audio output All terminations are electronically balanced pin 2 Hot pin 3 Cold and pin 1 Screen shield Please note that connecting to unbalanced amplifier inputs should be avoided as it will result in a 6 dB loss of level and limiters settings will be out by 6 dB LM S D4 user manual Page 7 user manual LMS D4 Outputs are configured as follows System O P 1 O P 2 OP 3 O P 4 TQ 308 Passive Left Right TQ 308 Pas Sub Left Sub Left Main Right Sub Left Main TQ 310 Passive Left Right TQ 310 Pas Sub Left Sub Left Main Right Sub Left Main TQ 310 Pas Monitor Left Right TQ 315 Passive Left Right TQ 315 Pas Sub Left Sub Left Main Right Sub Left Main TQ 315 Pas Monitor Left Right TQ 315 Biamp Left LF Left HF Right LF Right HF TQ 315 Biamp Sub Sub Low High TQ 315 Biamp Mon Left LF Left HF Right LF Right HF TQ 440 Left LF Left HF Right LF Right HF TQ 440 TQ 425 Sub Low High TFM 420 Left LF Left HF Right LF Right HF TFM 450 Left LF Left HF Right LF Right HF THL 2 Left LF Left HF Right LF Right HF THL 2 THL 828 Sub Low High THL 811 THL 828 Left Sub Left Main Right Sub Right Main TQ 200 Series Left Sub Left Main Right Sub Right Main TCS Series Left Sub Left Main Right Sub Right Main TXD Series Left Sub Left Main Right Sub Right Main Mono Flat ChA Ch B Ch C Ch D Stereo Flat Ch A Left Ch B Left Ch A Right
12. ts Input LED s The bottom green LED indicates when the input signal is at 24dBu whereas the top red LED indicates overload of the analogue to digital converter Limiters LED s Indicates when limiting occurs on a particular output channel The red LED is set at the limiter threshold for that channel provided limiter and gain settings are correct Mute Key This mute key is active on all four output channels simultaneously The red LED is illuminuted when the channels are muted RS232 input The 9 pin socket allows communication with a PC via a serial COM port and a standard RS232 cable LM S D4 user manual Page 6 user manual LMS D4 Rear Panel Functions Lert 1 Mains Power Connected via a standard IEC socket A compatible power cord is supplied with the unit 2 Mains Fuse Located in a finger proof fuseholder integral to the mains inlet Always replace this fuse with the correct type as shown on the rear panel legend N B A spare fuse is located in this holder 3 Audio Inputs 3 pin female XLR connectors are provided for each audio input All terminations are electronically balanced pin 2 Hot pin 3 Cold and pin 1 Screen shield The input sensitivity is pre set at Odb The overall default gain of the unit is set at 14dB Please note that when the unit is operated in mono 3 way mode the input signal is to be fed into the RIGHT MONO connector 4 Audio Outputs 3 pin male XLR connec
13. use of this product that is not in accordance with the instructions provided by TURBOSOUND are not covered by this warranty This warranty is exclusive and no other warranty is expressed or implied TURBOSOUND is not liable for consequential damages LM S D4 user manual Page 16 user manual LMS D4 Turbosound Ltd Star Road Partridge Green West Sussex RH13 8RY England Tel 44 0 1403 711447 Fax 44 0 1403 710155 w eb www turbosound com LM S D4 user manual Page 17
14. vide an optimally flat response for a single cabinet in free space When the cabinet is used in direct proximity of a reflecting surface i e half space conditions the LF level should be reduced to maintain the same balance in theory by 3dB Similarly when a number of cabinets are closely coupled e g in arrays the LF control should be used to reduce the level in the bottom end This control can also be used to create subjectively desired changes to the tonal balance Please remember to use it with care as excessive boost could mean more stress for the drive units and make it more critical to have the limiters accurately set Bass boost is not implemented in settings for speaker systems with subwoofers LM S D4 user manual Page 11 user manual LMS D4 3 Sub bass channels operation mode OP1 3 Sub Mode Stereo The possible values are Stereo and MonoSum L4R With a system using a stereo two way configuration and having channels 1 and 3 dedicated for sub bass operation it is possible to set these channels either as independent i e in stereo mode or with the signals from both Left and Right inputs summed Note this screen is not available on monitor programs or bi amp with sub programs 4 Peak Limiters OP1 3 Sub Limiter 5dBu Each output has an independent high performance limiter with both attack and release times fixed and optimally preset according to the frequency range of the channel it
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