JL Audio HD900/5 Cooling Efficiency Considerations, Your JL Audio amplifier employs an

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Cooling Efficiency Considerations:

Your JL Audio amplifier employs an

advanced type of heat management, called RealSink™. This feature takes advantage of convection and radiation effects to remove heat from the amplifier circuitry. For optimum cooling performance, the vertical heat sinks located at the sides of the amplifier should be exposed to as large a volume of air as possible. Enclosing the amplifier in a small, poorly ventilated chamber can lead to excessive heat build-up and degraded performance. If an installation calls for an enclosure around the amplifier, we recommend that this enclosure be ventilated with the aid of a fan. In normal applications, fan-cooling is not necessary.

If mounting the amplifier under a seat, make sure there is at least 1 inch (2.5 cm) of space above the amplifier’s outer shell to permit proper cooling.

 

Filter Slope

Filter Frequency

 

Input Mode

 

Selection

Selector

 

Selection

 

(pg. 11)

(pg. 10)

 

(pg. 9)

quency

Input Sensitivity

Filter Slope

Input Voltage

ctor

 

Control

Selection

Selection

11)

 

(pg. 10)

(pg. 11)

(pg. 9)

Speaker Outputs

(pgs. 13-14)

Safety Considerations:

Your amplifier needs to be installed in a dry, well-ventilated environment and in a manner which does not interfere with your vehicle’s safety equipment (air bags, seat belt systems, ABS brake systems, etc.). You should also take the time to securely mount the amplifier using appropriate hardware so that it does not come loose in the event of a collision or a sudden jolt to the vehicle.

Stupid Mistakes to Avoid:

Check before drilling any holes in your vehicle to make sure that you will not be drilling through a gas tank, brake line, wiring harness or other vital vehicle system.

Do not run system wiring outside or underneath the vehicle. This is an extremely dangerous practice which can result in severe damage to your vehicle and person.

Protect all system wires from sharp metal edges and wear by carefully routing them, tying them down and using grommets and loom where appropriate.

Do not mount the amplifier in the engine compartment, under the vehicle, on the roof or in any other area that will expose the amplifier circuitry to the elements.

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Contents Channel Class-D System Amplifier Serial Number Installation ApplicationsPlanning Your Installation Protect Your HearingStupid Mistakes to Avoid Safety ConsiderationsCooling Efficiency Considerations Your JL Audio amplifier employs anAs we said, it’s very flexible Product DescriptionTypical Installation Sequence Run power wire from the battery locationConnect the RCA input cables To the amplifier Ground Connection +12V Battery ConnectionPower Wire Requirements Fuse RequirementsAmplifier Power Connector Plug Turn-On WireSecurity cover is secured by a single HD900/5 has two mounting options to ease in installationStandard Mounting Lateral Mounting FeetAmplifier INPuTS Input Mode SwitchCh. Input Mode Input Voltage SwitchInput Sens. Controls Channel Control SectionsInfrasonic Filter Subwoofer Ch. Only Filter Freq. Hz ControlBi-AmpLIFIED SYSTEMS After proper adjustment of the HD900/5’sSpeaker Outputs REmote level control OptionalStandard telephone cable supplied with the HD-RLC Multiple phone cablesSpeaker Connector Plugs Status LED / Protection Circuitry JL Audio Technical Support Servicing your JL Audio AmplifierInput Sections Appendix a HD900/5 SpecificationsChassis Dimensions LxWxH Crossover FiltersAppendix B  Precise Frequency Selection Chart Full-clockwise Appendix CNecessary Equipment Nine-Step Procedure Channels at 3/4 source unit volumeIncrease the Input Sens. control until My amplifier doesn’t turn on My amplifier turns on, but there is no output INSTALLATION NOTES Page International Warranties Limited Warranty Amplifiers USAIf you need service on your JL Audio product JL Audio, Inc