Meyer Sound LD-2 Operations Instructions

OPERATING INSTRUCTIONS LD-3 Air Attenuation Compensating Line DriverKeep these important operating instructions.Check www.meyersound.com for updates.

4CHAPTER 1

5CHAPTER 2Much more than a system integration tool, the LD-3 line driver uses its sophisticated circuitry to bring consistent and predictable results

6CHAPTER 27CHAPTER 2TemperatureThe green Temperature control allows you to set temperature in 1° increments from 0° to 45° C. A convenient Fahrenheit

6CHAPTER 27CHAPTER 2The Array Correction section (Figure 2.4), lets you set the type of M Series loudspeaker using the Array Type selector switch and

8CHAPTER 29CHAPTER 2For example, if the Temperature is set to 25° and the Relative Humidity to 40%, press Enter, then change the Temperature to 30°; p

8CHAPTER 29CHAPTER 2 NOTE: Although the LD-3 offers a large gain range (-6 to +6 dB) for each output, gain tapering is not recommended for arr

10CHAPTER 211CHAPTER 2Once the correction changes are enabled, press the Enter button and the LD-3 changes how much correction is needed due to the th

10CHAPTER 211CHAPTER 2Insert SwitchEach Sub channel utilizes an Insert switch (Figure 2.12) which, when engaged, is useful for driving a sub with a di

12CHAPTER 2

13CHAPTER 3The LD-3 opens up a number of design and integration scenarios. Its versatility, in conjunction with different M Series loudspeakers and/or

iiDECLARATION OF CONFORMITY ACCORDING TO ISO/IEC GUIDE 22 AND EN 45014Manufacturer's Name:Meyer Sound Laboratories Inc.Manufacturer's Addres

14CHAPTER 315CHAPTER 3LOUDSPEAKER/SUBWOOFER INTEGRATIONUsing the LD-3’s lters helps to easily integrate and optimize your M Series arrays with subwoo

14CHAPTER 315CHAPTER 3 NOTE: When loudspeakers and subwoofers are physically separated by more than 4 feet – or delay must be used between the

16CHAPTER 3

17APPENDIX AAPPENDIX A LD-3 Line Driver Specifications ATMOSPHERIC CORRECTION (Affects Output Channels 1-3, both A & B) Temperature 0 to 45° Celsi

18APPENDIX AINPUT CONNECTORS Master A & B 2 Female XLR; 1 per input channel Insert/ReturnSub Input2 Female XLR; 1 per input channel Channels 1-3

19APPENDIX BAPPENDIX B Example ConfigurationsLeftRightLD-3Channel AIN SUB OUTCH 1 OUTCH 2 OUTCH 3 OUTChannel BIN SUB OUTCH 1 OUTCH 2 OUTCH 3 OUTChanne

20APPENDIX B21APPENDIX BLeftRightLD-3Channel AIN SUB OUTCH 1 OUTCH 2 OUTCH 3 OUTChannel BIN SUB OUTCH 1 OUTCH 2 OUTCH 3 OUTChannel AINSERTS SENDSIN SU

20APPENDIX B21APPENDIX BDigital Delay2 In x 6 OutDigital Delay/EQLD-3Channel AIN SUB OUTCH 1 OUTCH 2 OUTCH 3 OUTChannel BIN SUB OUTCH 1 OUTCH 2 OUTCH

22APPENDIX C23APPENDIX CAPPENDIX C LD-3 Signal Flow Diagram321ESDAbsorberESDAbsorberRF Filter10k-12 to +6dBMASTERLEVELARRAY SIZECORRECTIONSignal &

22APPENDIX C23APPENDIX C321ESDAbsorberESDAbsorberRF Filter10k-12 to +6dBMASTERLEVELARRAY SIZECORRECTIONSignal & ClipDetector-+ESDAbsorbers321POWER

iiiSYMBOLS USEDThese symbols indicate important safety or operating features in this booklet and on the chassis:1. Read these instructions.2. Keep t

24APPENDIX C

24APPENDIX C

© 2003Meyer Sound Laboratories Inc.All Rights ReservedMeyer Sound Laboratories Inc.2832 San Pablo AvenueBerkeley, CA 94702USAT: +1 510 486.1166F: +1 5

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vCONTENTSINTRODUCTION 1How to use this manual 1Introducing The LD-3 Air Attenuation Compensating Line driver 1CHAPTER 1: AC Power Requirements 3CH

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1INTRODUCTION HOW TO USE THIS MANUALAs you read this manual, you’ll nd gures and diagrams to help you understand and visualize what you’re reading.

2INTRODUCTION Figure i.4. Air absorption for 30 degrees C at 100 metersIn addition to weather correction, the LD-3’s unique ability to compensate for

3CHAPTER 1The LD-3 uses an international standard IEC 320 mains AC inlet. This convenient rear panel receptacle accepts many power cord types for main