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

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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