Jl-audio HD900/5 User Manual

OWNER’S MANUAL5-Channel Class-D System AmplifierThank you for purchasing a JL Audio amplifier for your automotive sound system. Your amplifier has be

10 | JL Audio - HD900/5 Owner’s Manual The output of the amplifier decreases for a given input voltage when the “Input Range” switch is placed in

11while the “Sub” channel filter is a low-pass filter (attenuates high frequencies). For each filter, the user can select from a shallow (12dB/octave)

12 | JL Audio - HD900/5 Owner’s Manual BIAMPLIFIED SYSTEMSBi-amplified systems are defined as systems in which separate amplifier channels drive l

13REMOTE LEVEL CONTROL OPTIONALWith the addition of the optional Remote Level Control (HD-RLC), you can control the level of the Subwoofer Channel o

14 | JL Audio - HD900/5 Owner’s Manual BRIDGING CONSIDERATIONSBridging is the practice of combining the output of two amplifier channels to drive a

15“STATUS” LED / PROTECTION CIRCUITRYThere is a single multi-color LED on the control panel of the amplifier to indicate the amplifier’s operating sta

16 | JL Audio - HD900/5 Owner’s Manual SERVICING YOUR JL AUDIO AMPLIFIERIf your amplifier fails or malfunctions, please return it to your authorize

17APPENDIX A:HD900/5 SpecificationsAmplifier Topology: Class D, switching type with patented Single-Cycle Control™ technology.Power Supply: Pulse wid

18 | JL Audio - HD900/5 Owner’s Manual APPENDIX B: Precise Frequency Selection Chart“FILTER FREQ” Detent Panel Actual Number Marking Freq.

19The Nine-Step Procedure (follow this procedure for each pair of channels)1) Disconnect the Speaker Connector Plugs.2) Turn off all processing on t

2 | JL Audio - HD900/5 Owner’s Manual PROTECT YOUR HEARING! We value you as a long-term customer. For that reason, we urge you to practice restrain

20 | JL Audio - HD900/5 Owner’s Manual “How do I properly set the input sensitivity on my amplifier” Please refer to Appendix C (pages 18, 19) to

21“My amplifier shuts off once in a while, usually at higher volumes” Check your voltage source and grounding point. The power supply of the HD900/5

22 | JL Audio - HD900/5 Owner’s Manual INSTALLATION NOTES:Use this diagram to document your amplifier’s switch and control positions.

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LIMITED WARRANTY  AMPLIFIERS USAJL AUDIO warrants this product to be free of defects in materials and workmanship for a period of two (2) years fr

3Cooling Efficiency Considerations: Your JL Audio amplifier employs an advanced type of heat management, called RealSink™. This feature takes advantag

4 | JL Audio - HD900/5 Owner’s Manual PRODUCT DESCRIPTIONThe JL Audio HD900/5 is a very powerful and compact five-channel amplifier utilizing paten

5TYPICAL INSTALLATION SEQUENCEThe following represents the sequence for a typical amplifier installation, using an aftermarket source unit or OEM Inte

6 | JL Audio - HD900/5 Owner’s Manual POWER AND TURNON CONNECTIONSBefore installing the amplifier, disconnect the negative (ground) wire from the

7For optimal grounding, we recommend the use of a JL Audio ECS master ground lug (XB-MGLU). Alternatively, a sheet metal screw or bolt can be used wit

8 | JL Audio - HD900/5 Owner’s Manual AMPLIFIER MOUNTING OPTIONSThe HD900/5 has two mounting options to ease in installation. Standard MountingThe

9AMPLIFIER INPUTSThe HD900/5 has three separate input sections, one for the “Front” left and right channels, another for the “Rear” left and right cha