Operating Instructions
Contents
1. diagram shows half of the system using channels 1 3 and 5 identical connections can be used for channels 2 4 and 6 to create the other half The MSL 4 DS 2P and CQ arrays are flown the 650 Ps are on the floor The CH 1 Mid Hi and CH 3 outputs drive the inner three and outer two speakers of the MSL 4 array applying appropriate levels for speakers directed at different distances The diagram shows the additional mid hi output created by connecting the CH 1 Loop to the CH 3 input Using a Y connection at the CH 1 input as shown for the CQ down fills accomplishes the same signal routing The Lo Cut and Array EQ switches for CH 1 and 3 should be in The Lo Cut filters eliminate the LF rise caused by the overlap in frequency response between the MSL 4 and DS 2P 650 P systems The Array EQ filters minimize the MSL 4 array s low mid rise The CH 1 DS 2 and Sub outputs drive the DS 2P and 650 P systems with the DS 2 amp Sub Crossover switch in Set the MSL 4 and DS 2P to the same polarity The polarity of the 650 P depends on the height and distance of the mea surement position from the subwoofer and flown systems CH 5 controls the CQ down fill system Since the main system is more powerful than the down fill system to project farther into the venue the main system is audible in the down fill s coverage area To insure that the speakers combine properly in the intersecting coverage area e Set the CQ to the opposite polarity to t2. essayer de le d monter Il n y a aucun composant qui puisse tre r par par l utilisateur Toutes les r parations doivent tre effectu es par du personnel qualifi et agr par le constructeur Espa ol Para reducir el riesgo de descarga el ctrica desconecte de la red el altoparlante antes de instalar el cable de se alizaci n de interfaz de la segnale Vuelva a conectar el conductor flexible de alimentaci n solamente una vez efectuadas todas las interconexiones de se alizatci n Conecteelaltoparlante a un tomacorriente bipolar y trifilar con neutro de puesta a tierra El tomacorriente debe estar conectado a la protecci n de derivaci n apropiada ya sea un fusible o un disyuntor La conexi n a cualquier otro tipo de tomacorriente puede constituir peligro de descarga el ctrica y violar los c digos el ctricos locales No deje que en el altoparlante entre agua ni ning n objeto extra o No ponga objetos con l quidos encima de la unidad ni cerca de ella Para reducir el riesgo de sobrecalentamiento no exponga la unidad a los rayos directos del sol ni la instale cerca de artefactos que emiten calor como estufas o cocinas Este altoparlante contiene niveles de voltaje peligrosos en potencia Nointente desarmar la unidad pues no contiene piezas que puedan ser repardas por el usuario Las reparaciones deben efectuarse nicamente por parte del personal de mantenimiento capacitado en la f brica 10 Architectur
3. male XLR Loop connector CH 1 Signal Mute Clip CH 2 Signal Mute Clip SS DS 2 d Master ke Se g Crossover The Master gain control sets the channel e overall level The Mute switch mutes the entire channel The bicolored Signal Mute Clip LED indicates input signal presence and level witha variable intensity green color and clipping or mute with red The Loop connector is used to send the input signal to an auxiliary channel or to another device The Mid Hi DS 2 mid bass and Sub outputs each have a level control and mute switch The level control modifies the level set by the channel s Master gain control the mute switch affects the Mid Hi DS 2 or Sub output only For example the Mid Hi output could be muted without affecting the Loop Sub or DS 2 outputs Additional functions specific to each output are described in the following sections Mid Hi Output The Mid Hi output has two switch activated optimized filters Pushing the Lo Cut switch in activates a high pass filter 160 Hz Q 0 8 12 dB octave that performs a crossover function for the Mid Hi output The filter is bypassed with the switch out Pushing the Array EQ switch in activates a filter 6 dB cut at 220 Hz 0 6 octave bandwidth to equalize the low mid rise produced by three to five horizontally arrayed MSL 4s The filter is bypassed with the switch out NOTE The Array EQ filter compensates for MSL 4 array characteristics in free space W
4. A li Meyer Sound Meyer Sound LD 1A Line Driver LD 1A Front Panel Mid Hi Out LD 1A Rear Panel CH 1 Signal Mute Clip CH 2 Signal e Mute Clip G DS 2 0 Master eae meu Crossover Channel 1 DS 2 Out Sub Out Channel 2 Operating Instructions Line Driver Patents Pending CH 3 Signal e Mute Clip CH 4 Signal e Mute Clip Mute Channel 3 PUSH KE Output z Input Input P P Channel 4 Copyright 1997 LD TA CH5 Signal e Mute Clip CH6 Signal e Mute Clip Mute ie Active Mute Mute Mute Polarity a 0 180 Crossover E Sub DS 2 amp Sub Channel 5 Channel 7 PUSH __ Input Output Output Channel 6 Channel 8 Meyer Sound Laboratories Inc All rights reserved Part 05 037 002 01 Rev B2 CH7 Signal Mute Clip CH 8 Signal e Mute Clip Mute CAUTION Set voltage before applying power AC Voltage Ranges 180 250V 90 125V CAUTION RISK OF FIRE REPLACE WITH T250mA 250V FUSE 90 125 180 250 V 50 60 Hz 25W MAX Symbols Used These symbols indicate important safety or operating features in this booklet and on the chassis A A K S Dangerous voltages Important operating risk of electric shock instructions Frame or chassis Protective earth ground Pour indiquer les risques Pour indequer important rEsultant de tensions q H Masse ch seis Terre de protection Instructions dan
5. ERCIAL AUDIO SYSTEM Meyer Sound Lab GmbH Carl Zeiss Strasse 13 56751 Polch Germany Contact Information Meyer Sound Laboratories Inc Meyer Sound Germany GmbH 2832 San Pablo Avenue Carl Zeiss Strasse 13 Berkeley California 94702 D 56751 Polch Germany Telephone 510 486 1166 Telephone 49 2654 9600 58 FAX 510 486 8356 FAX 49 2654 9600 59 E mail info meyersound com Email meyersound t online de www meyersound com Contents LD 1A Signal Flow Diagramm 3 Auxiliary Channels 28 6 ergeet te a eereeer pepcere cert teeter rire err renter trent errr 4 Example Configurations 1sccscccsesecssecnececanscsseseaseenes 7 AUO ere 4 Safety e le e EE 9 AC POW EE 4 DDCCITICATIONS EE 10 Main Channels 1 and 2 5 SIGNAL amp CLIP a RED DETECTOR Common mode 425 kHz low pass 80 dB CMRR Normal mode Laser Trimmed XLR Master Mute Switch FILTER 12 to 6 dB Earth and Chassis GND Audio GND I I Kaes Se 10 W on Jenil power supply board Channels 1 amp 2 only High Current Mid Hi Full range Flat Level Mid Hi Mute XLR O Switch DIFFERENTIAL id Hi ge we Low cut ArrayEQ H D6 dB at 12 to 6 dB 220Hz 0 6 octave bandwidih Earth and Chassis GND vA mean Channels T amp 2s0nly 24 EE ee Sees a SSS Sa SSS SS SS SS SS SSS Se SS eS SS EES EE l High Current DS 2 1 Level DS 2 Mute Polarity XLR Full range Switel normal i ave e DIFFERENTIAL D
6. a noisy audio signal Most modern balanced audio sources electronically balanced or transformer output conform to the wiring convention described above and interface correctly with the LD 1A However an audio source may produce noise if it connects pin 1 to a quiet internal audio ground and is then connected to pin 1 of the LD 1A chassis earth To alleviate this noise try disconnecting pin 1 or the cable shield of the audio source To connect an unbalanced audio source to the LD 1A use the following wiring connections RCA output LD 1A input XLR lt chassis earth terminal shield Tip is positive terminal Ring is negative terminal Connect shield to terminal ring if the source equipment is floating Do not connect the shield if the source is grounded AC Power AC Inlet and Voltage Select Switch The LD 1A uses an international standard IEC 320 Mains AC inlet This convenient rear panel receptacle accepts many power cord types for mains outlets used throughout the world The LD 1A must have the correct power cord for the AC power in the area in which it will be used The LD 1A operates in two AC voltage ranges 90 125 V and 180 250 V at 50 or 60 Hz The voltage select switch on the rear panel must be set to the proper voltage before applying AC power Connecting the LD 1A to a 225 V AC source with the voltage select switch in the 90 125 V position could blow the fuse Unplug t
7. ate local electrical codes Do not allow water or any foreign object to get inside the LD 1A Do not put objects containing liquid on or near the unit To reduce the risk of overheating the LD 1A avoid exposing it to direct sunlight Do not install the unit near heat emitting appliances such as a room heater or stove The LD 1A contains potentially hazardous voltages Do not attempt to disassemble the unit The unit contains no user serviceable parts Repairs should be performed only by factory trained service personnel Deutsch Um die Gefahr eines elektrischen Schlages auf ein Mini mum zu reduzieren den Lautsprecher vom Stromnetz trennen bevor ggf ein Audio Schnittstellensignalkabel angeschlossen wird Das Netzkabel erst nach Herstellung aller Signalverbindungen wieder einstecken Der Lautsprecher an eine geerdete zweipolige Dreiphasen Netzsteckdose anschlie en Die Steckdose mufs mit einem geeigneten Abzweigschutz Sicherung oder Leistungsschalter verbunden sein Der Anschlu der unterbrechungsfreien Stromversorgung an einen anderen Steckdosentyp kann zu Stromschl gen f hren und gegen die rtlichen Vorschriften versto en Darauf achten daf weder Wasser noch Fremdk rper in das Innere den Lautsprecher eindringen Keine Objekte die Fl ssigkeit enthalten auf oder neben die unterbrechungsfreie Stromversorgung stellen Um ein berhitzen dem Lautsprecher zu verhindern das Ger t vor direkter Sonneneinstrahlung f
8. ay systems or compensation for significant reverberation We recommend using the Meyer SIM System II Sound Analyzer and CP 10 Parametric Equalizer to e assist the process of choosing and configuring speakers e measure propagation delays between subsystems to set the correct polarity and delay times e measure and equalize variations in frequency response caused by the acoustical environment and the placement and interaction of speakers Contact Meyer Sound for assistance with your application MSL 4 and PSW 2 The MSL 4 and PSW 2 form a compatible full range system However due to an overlap in LF low frequency response between the two speakers there is a rise in the system frequency response in the range 65 120 Hz It is important to emphasize that the speakers are in phase in this region The rise can be eliminated by activating the Lo Cut filter for the Mid Hi output if desired CH 1 Mid Hi LD 1A Line Driver CH 1 Sub Set the MSL 4 and PSW 2 to the same polarity Although a typical MSL 4 PSW 2 ratio is 2 1 the Sub and Mid Hi gain controls allow the ratio to vary while main taining control of the spectral balance of the system The 650 P can be used interchangeably with the PSW 2 but the 650 P s larger size precludes tight packing configurations with the MSL 4 the 650 P also lacks rigging hardware MSL 4 DS 2P and 650 P Adding the DS 2P to an MSL 4 650 P system enhances LF power and clarity Wit
9. e Main Channels 1 2 Master Gain Control Specifications 12 to 6 dB Mid Hi DS 2 Sub Gain Controls 12 to 6 dB Low cut Filter for Mid Hi Output 160 Hz high pass 12 dB octave Q 0 8 Array EQ Filter for Mid Hi Output 6 dB cut at 220 Hz 0 6 octave bandwidth Mute Mute switches for Master Mid Hi DS 2 and Sub outputs Polarity Toggles for Sub and DS 2 outputs Auxiliary Channels 3 8 Gain Control 12 to 6 dB Low cut Filter 160 Hz high pass 12 dB octave Q 0 8 Array EQ Filter 6 dB cut at 220 Hz 0 6 octave bandwidth Mute Audio Inputs Connector Mutes the channel output 1 female XLR per channel Type Differential balanced input circuit Impedance 10 k differential between pins 2 and 3 Wiring Pin 1 chassis earth ground Pin 2 signal Pin 3 signal RF Filter Common Mode 425 kHz low pass Differential Mode 142 kHz low pass Common Mode Rejection Ratio gt 80 dB typically 90 dB measured in the range 50 Hz 1 kHz Signal Presence LED Variable intensity monitored at the input for each channel Threshold 26 dBV 50 mVrms pink noise or sinewave Full Intensity Audio Outputs Type 10 dBV 300 mVrms pink noise or sinewave Balanced cross coupled simulated transformer topology Impedance 50 Ohm balanced between pins 2 and 3 RF Filter Pins 2 and 3 shunted to chassis via 500 pF capac
10. e recommend using the Meyer SIM System I Sound Analyzer and CP 10 Paramet ric Equalizer to measure and correct problems caused by the acoustical environment It is important to note that the Mid Hi output produces a full range signal when both the Array EQ and Lo Cut filters are out bypassed DS 2 and Sub Outputs The DS 2 amp Sub Crossover network optimized for the DS 2P and 650 P or PSW 2 is composed of a low pass and an elliptical filter Pushing the switch in activates the two way crossover sending frequencies below 80 Hz to the Sub output and above 80 Hz to the DS 2 output With the switch out a full range signal is sent to both the DS 2 and Sub outputs When the DS 2P is used alone as a subwoofer or is not included in the system the switch should be out NOTE Full range signals may be applied to Meyer self powered subwoofers because they have built in active crossovers that filter mid hi frequencies external cross overs are unnecessary The DS 2 and Sub outputs each have a polarity toggle DS 2 d Sub p With the switch out the polarity is set to 0 Pushing the switch in inverts the polarity 180 with respect to the out position Auxiliary Channels 3 8 The six auxiliary channels 3 8 control down fill front fill and delay systems Each channel has a Signal Mute Clip indicator gain control mute switch and Lo Cut and Array EQ filters all of which are explained in the previous section Cha
11. ernhalten und nicht in der N he von w rmeabstrahlenden Haushaltsger ten z B Heizger t oder Herd aufstellen Im Inneren diesem Lautsprecher herrschen potentiell gef hrliche Spannungen Nicht versuchen das Ger t zu ffnen Es enth lt keine vom Benutzer reparierbaren Teile Reparaturen d rfen nur von ausgebildetem Kundenienstpersonal durchgef hrt werden Fran ais Pour r duire le risque d lectrocution d branchez la prise principale de l haut parleur avant d installer le c ble d interface allant l audio Ne rebranchez le bloc d alimentation ou apres avoir effectu toutes les connections Branchez l haut parleur dans une prise de courant 3 d rivations deux p les et la terre Cette prise doit tre munie d une protection ad quate fusible ou coupe circuit Le branchement dans tout autre genre de prise pourrait entrainer un risque d lectrocution et peut constituer une infraction a la r glementation locale concernant les installations lectriques Ne pas laisser de l eau ou tout objet p n trer dans l haut parleur Ne pas placer de r cipients contenant un liquide sur cet appareil ni a proximit de celui ci Pour viter une surchauffe de l haut parleur conservez la l abri du soleil Ne pas installer proximit d appareils d gageant de la chaleur tels que radiateurs ou appareils de chauffage Ce haut parleur contient des circuits haute tension pr sentant un danger Ne jamais
12. gereuses Zu wichtige betriebs anweisung und unter Rahmen oder chassis Die schutzerde haltsanweisung zeigen Zu die gefahren von gef ohrliche spanning zeigen Para indicar importante funcionar y mantenimiento Armadura o chassis Tierra proteccionista instrucciones Para indicar azares provengo de peligroso voltajes Declaration of Conformity According to ISO IEC Guide and EN 45014 The Manufacturer declares that the product Product Name LD 1A Product Options A I Name Meyer Sound Laboratories Address 2832 San Pablo Avenue Berkeley California 94702 2204 USA conforms to the following Product Specifications EN 60065 1994 Environmental Specifications for EN 55022 1987 Class A Meyer Sound Electronics Products IEC 801 2 1984 8 kV IEC 801 3 1984 3 V m Operating temperature 0 C to 45 C IEC 801 4 1984 0 5 kV Signal Lines Non operating temp lt 40 Cor gt 75 C 1 0 kV Power Lines Humidity to 95 at 35 C The product herewith complies with the requirements Operating altitude EE of the Low Voltage Directive 73 23 EEC and the Non operating altitude to 6300 m 25 000 ft EMC Directive 89 336 EEC Shock 30 g 11 msec half sine Office of Quality Manager on each of 6 sides Berkeley California USA Vibration 10 55 Hz 0 010 m April 1 1997 peak to peak excursion LISTED Made by Meyer Sound Laboratories Berkeley California USA European Office COMM
13. h the DS 2 amp Sub Crossover switch in the DS 2 and Sub outputs each receive signals optimized for the frequency response capabilities of the DS 2P and 650 P The MSL 4 is driven from the CH 1 Mid Hi output with the Lo Cut filter in to minimize the overlap in frequency response with the DS 2P and 650 P Set the 650 P to the opposite polarity to the MSL 4 and DS 2P CH 1 Mid Hi MSL 4 LD 1A DS 2P DS 4P 650 P CH 1 Sub Set the 650 P to the opposite polarity to the DS 2P and MSL 4 PSW 2 Flown with MSL 4 650 P on the Floor Including subwoofers in a flown cluster provides a smooth frequency image because the low and mid hi frequencies are produced from speakers located close together The identical dimensions of the PSW 2 and MSL 4 allow them to be easily flown together The CH 1 Mid Hi output drives the MSL 4 with the Lo Cut filter in The CH 1 Sub and DS 2 outputs drive the 650 Ps and PSW 2s with the DS 2 amp Sub Crossover switch out sending a full range signal to each speaker with independent levels MSL 4 and PSW 2 flown in same cluster CH 1 Input 650 P subwoofer on the floor Set the MSL 4 and PSW 2 to the same polarity The polarity of the 650 P depends on the height and distance of the measurement position from the subwoofers and flown cluster MSL 4 DS 2P 650 P with CO Down fill This example shows the LD 1A integrating a complete system of self powered speakers for a large venue The
14. he MSL 4 to phase align the mid hi frequencies and minimize the MSL 4 s LF down lobe e Use the CH 5 Lo Cut filter to eliminate the LF rise caused by the overlap in frequency response with the 650 P and DS 2P systems e Delay the down fill to compensate for the propa gation delay between the down fill and main systems in the intersecting coverage area We recommend that the entire system be measured phase aligned and equalized using the SIM System II Sound Analyzer and CP 10 Parametric Equalizer MSL 4 Mid Hi LD 1A CH 1 Input Mid Hi Output CP 10 EQ DS 2 Output Sub Output Loop Delay Input Output CH 3 Ge Il CP 10 EQ Input Output CH 5 650 P Subwoofers Set the MSL 4 and DS 2P to the same polarity reverse the polarity of the CQ The polarity of the 650 P depends on the distance of the measurement position from the subwoofer and flown systems E Safety Summary N English To reduce the risk of electric shock disconnect the LD 1A from the AC mains before installing audio cable Reconnect the power cord only after making all signal connections Connect the LD 1A to a two pole three wire grounding mains receptacle The receptacle must be connected to a fuse or circuit breaker Connection to any other type of receptacle poses a shock hazard and may viol
15. he power cord before changing the voltage select switch CAUTION Set voltage before applying power AC Voltage Ranges 180 250V Voltage select switch 90 125V CAUTION RISK OF FIRE REPLACE WITH T250mA 250V FUSE 90 125 180 250 V 50 60 Hz 25W MAX IEC 320 male power inlet The audio outputs are muted internally during normal power on and off and in case of sudden loss of AC power or unstable line voltage This precaution prevents noise transmission and possible damage to interconnected devices A Bey Don t use a ground lifting adapter or cut the AC ground pin To avoid electrical shock and damage to the unit use the power cord specified by Meyer Sound or an equivalent that satisfies the requirements of the local safety testing agency Do not operate the unit if the power cables are frayed or broken AC Fuse Always disconnect the power cord before changing the fuse To replace the fuse insert a flat blade screwdriver in the fuse cap and gently turn counterclockwise the fuse springs from its socket Replace only with a 5x 20mm T 250 mA 250 V time lag fuse that conforms to identical safety agency standards If the fuse blows again contact Meyer Sound for repair information Main Channels 1 and 2 Channels 1 and 2 are equipped to control a full range main system Each channel has a Signal Mute Clip LED indicator mute switch gain control Mid Hi DS 2 and Sub output controls and a
16. ie DRIVER DS 2 or l rossover S a polany ne Sub I to utput i inverted H I I 80Hz 1DS 2 amp Sub 1 Elliptical Crossover Earth and Chassis GND I I High Current i Sub i I Level Sub Mute Polarity XLR Full erg Switch normal i URL A O DIFFERENTIAL i OG DRIVER Sub ee Polarity Output TN 12 to 6 dB inverted 65Hz I Q 0 9 12 dB oct Earth and Chassis GND I I I Introduction The Meyer LD 1A Line Driver combines functions previously accessed on the control electronics units for externally amplified Meyer loudspeakers with new features and locates them in a self contained device accessible to the sound engineer during setup and performance The LD 1A e integrates different types of Meyer self powered speakers into a full range main system e provides gain mute and optimized EQ controls for six auxiliary systems e maintains signal integrity for long cable paths Channels 1 and 2 equipped to control the main system each have e again control mute switch and crossover function e separate Mid Hi DS 2 mid bass and Sub output controls e amale XLR Loop connector to route the input signal to an auxiliary channel or another device The six auxiliary channels 3 8 control down fill front fill and delay systems Auxiliary channels can also be used to divide a main system into subsystems allowing independent signal levels for speakers directed at different audience locations Each auxiliary channe
17. itance Connectors Main 4 female XLR channel Mid Hi DS 2 Sub Loop Auxillary 1 female XLR channel Wiring Pin 1 chassis earth ground Pin 2 signal Pin 3 signal Drive Capability Maximum Voltage 600 Ohm Load 22 5 Vok 24 dBV 26 2 dBu sinewave No Load 25 0 Vok 25 dBV 27 2 dBu sinewave Maximum Current 70 mApk 10 Vrms into 200 Ohm Cables and Load AC Power Connector Drives gt 100 000 pF gt 1000 ft cable without instability or distortion IEC 320 line neutral line earth Operating Voltage 90 125 VAC 180 250 VAC selectable with rear panel switch 50 60 Hz Maximum Power Audio Performance Frequency Response 25 Watts Fuse 5 x 20 mm T 250 mA 250 V time lag lt 0 2 dB 20 Hz 20 kHz Bandwidth DC to 60 kHz 3dB Phase Response lt 3 from pure 3 usec delay DC 20 kHz Dynamic Range gt 120 dB Noise Floor gt 95 dBV A weighted gt 90 dBV un weighted THD N4 lt 0 005 typically 0 002 Gain Accuracy lt 0 15 dB at 6 dB gain lt 0 25 dB at O dB gain Mute Attenuation gt 100 dB Gain Range Main Channels 24 to 12 dB Auxiliary Channels Physical Dimensions 12 to 6dB Height 3 45 inches 2 rack spaces Width 16 75 inches Depth 6 96 inches Weight 13 5 Ib 6 1 kg shipping 15 Ib 6 8 kg Enclosure Finish Black 16 gauge stee
18. l chassis 1 8 inch aluminum rack ears Notes 1 OdBV 1 Vrms 0 dBu 0 775 Vrms 0 dBm 1 mWrms 3 Level set to unity gain 0 dB 2 Ratio of maximum sinewave to A weighted noise floor channel 6 dB auxiliary channel 4 0 dBV 1 kHz sinewave input Gain at 12 dB main
19. l has a mute switch gain control and Lo Cut and Array EQ filters All eight channels are fully independent from each other The LD 1A occupies two rack spaces and is constructed with a 16 gauge steel chassis and s aluminum rack ears This rugged design provides protection from accidental impact magnetic isolation from nearby devices and EMI immunity Meyer Speaker Types The following Meyer self powered speakers are mentioned in this document MSL 4 Self powered mid hi speaker CQ Series Self powered mid hi speaker DS 2P Self powered mid bass speaker 650 P Self powered subwoofer PSW 2 Self powered subwoofer Audio Input The LD 1A presents a 10 kOhm balanced input imped ance to a three pin XLR connector wired with the follow ing convention Case _ Earth AC ground and chassis Pint Earth AC ground and chassis Pin2 Signal Differential Inputs Pin3 Signal The LD 1A is balanced in and out and consequently has no hot pin Pins 2 and 3 carry the input as a differential signal Use standard audio cables with XLR connectors for balanced signal sources The audio input signal should always be applied between pins 2 and 3 Pin 1 is connected to chassis and acts as a safety and current bleed to earth for the EMI and ESD interference coupled onto the shield of the input cable Pin 1 is therefore a noisy ground and connecting an audio signal between pins 1 and 2 or pins 1 and 3 results in
20. nnels 3 8 are identical channels 4 and 5 are shown below CH 4 Signal Mute Clip SS Mute 0 CH 5 Signal Mute Clip Mute Cl E Active Mute Polarity EE 0 180 Crossover SE om C Lo Cut Sub Array dei DS 2 amp Sub t Lo Cut Array ve Auxiliary channels 4 and 5 with switch function summary The auxiliary channels can also divide the main system into separate subsystems For example 1 Route the CH 1 input signal to CH 3 using the CH 1 Loop connector 2 Connect the CH 3 output to the outer two elements of an array of five mid hi speakers 3 Connect the Mid Hi output to the inner three elements of the mid hi array Using main and auxiliary channels to apply separate levels for the edge and internal elements of a mid hi system is incorportated into an example configuration on page 8 Example Configurations This section demonstrates the flexibility and utility of the LD 1A with four example applications Speaker Placement and Polarity The cabinets in the following example configurations are in a close proximity coplanar orientation unless other wise stated Placing speakers more than 5 feet apart may require setting them to opposite polarities to compensate for the propagation delay between speakers Measurement and Correction Measurement and correction tools are required to as semble a complete sound system particularly when the venue requires precise array design del
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