JL Audio HD900/5 REmote level control Optional, Standard telephone cable supplied with the HD-RLC

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REmote level control (OPTIONAL)

With the addition of the optional Remote Level Control (HD-RLC), you can control the level of the Subwoofer Channel of the HD900/5 from the front of the vehicle. The HD-RLC connects to the jack labeled “Remote Level Control” on the Connection Panel of the amplifier using

a standard telephone cable (supplied with the HD-RLC).

If desired, multiple HD amplifiers can be controlled from a single HD-RLC controller using a simple phone line “splitter”

and multiple phone cables.

When connected to the amplifier, the HD-RLC operates as follows. At full counter-clockwise rotation, the audio will mute completely. At full clockwise rotation the level will be the same as if the HD-RLC was not connected at all. In other words, it operates strictly as a level attenuator.

When no HD-RLC is connected, the Level Control circuit is defeated.

The RBC-1 Remote Bass Control used with

JL Audio Slash, Slash v2, e-Series, A-Series and G-Series amplifiers is NOT compatible with the HD Series amplifiers. If you attempt to connect an RBC-1 to an HD amplifer, the control will not work. You must use the HD-RLC controller.

Speaker OUTPUTS

The HD900/5 employs JL Audio’s exclusive Regulated, Intelligent Power Supply (R.I.P.S.) design. The operation of the R.I.P.S. system is independent for each channel section. This sophisticated power supply allows the amplifier to produce its optimum power into higher impedances as well as low impedances.

The R.I.P.S.-equipped HD900/5 gives you the freedom to use a variety of speaker configurations that achieve final nominal impedances between 1.5 – 4Ω per channel in stereo while maintaining 75 - 100W x 4 of clean power output. When bridged, each main channel pair will optimize output at 150-200 watts between 3 – 8Ω. The mono subwoofer channel will deliver its full 500W output into any impedance between 1.5-4Ω. The operation of the R.I.P.S. circuitry is

entirely automatic and adjusts itself every time the amplifier is turned on. There are no user controls to configure. The system operates through multiple stages of impedance optimization, choosing the stage most appropriate to the actual impedance of the speakers you connect to it.

If you connect a load higher than 4Ω nominal per channel in stereo mode (or 8Ω in bridged mode), power will drop by half with every doubling of impedance above 4Ω stereo / 8Ω mono. If you connect a load lower than 1.5Ω nominal per channel in stereo mode (or 3Ω in bridged mode, the amplifier protection circuitry activates a “safe” mode which reduces amplifier power to protect the circuitry from failure (the LED status indicator on the control panel will light up amber to indicate that this has happened). See page 15 for details.

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Contents Channel Class-D System Amplifier Planning Your Installation Installation ApplicationsProtect Your Hearing Serial NumberCooling Efficiency Considerations Safety ConsiderationsYour JL Audio amplifier employs an Stupid Mistakes to AvoidAs we said, it’s very flexible Product DescriptionRun power wire from the battery location Typical Installation SequenceConnect the RCA input cables To the amplifier Power Wire Requirements +12V Battery ConnectionFuse Requirements Ground ConnectionAmplifier Power Connector Plug Turn-On WireStandard Mounting HD900/5 has two mounting options to ease in installationLateral Mounting Feet Security cover is secured by a singleCh. Input Mode Input Mode SwitchInput Voltage Switch Amplifier INPuTSInput Sens. Controls Channel Control SectionsInfrasonic Filter Subwoofer Ch. Only Filter Freq. Hz ControlBi-AmpLIFIED SYSTEMS After proper adjustment of the HD900/5’sStandard telephone cable supplied with the HD-RLC REmote level control OptionalMultiple phone cables Speaker OutputsSpeaker Connector Plugs Status LED / Protection Circuitry JL Audio Technical Support Servicing your JL Audio AmplifierChassis Dimensions LxWxH Appendix a HD900/5 SpecificationsCrossover Filters Input SectionsFull-clockwise Appendix C Appendix B  Precise Frequency Selection ChartNecessary Equipment Channels at 3/4 source unit volume Nine-Step ProcedureIncrease the Input Sens. control until My amplifier doesn’t turn on My amplifier turns on, but there is no output INSTALLATION NOTES Page If you need service on your JL Audio product Limited Warranty Amplifiers USAJL Audio, Inc International Warranties