JL Audio HD900/5 5 Ch. Class D System Amplifier, 900 W

When the HD amplifiers were introduced in 2008, they wowed the industry with their amazing technological content and impressive power density. Subsequent and continued success in the marketplace is testament to the excellence of their design. They remain unmatched in offering compact packaging, along with the flexibility and stability of our Regulated, Intelligent Power Supply (R.I.P.S.) technologies.

“Small” is not the only story here. Making a small amplifier is great, of course... but not if power and sound quality are sacrificed. Our engineering team focused on achieving world-class fidelity first, and then on making our HD amplifiers amazingly powerful, efficient and small. These efforts led to a remarkable switching amplifier technology called Single Cycle Control™, which allowed all of these goals to be achieved.

This exclusive core amplifier technology is mated to our regulated, intelligent power supply (R.I.P.S.), advanced thermal management systems and a full complement of studio-grade processing features. Behind every HD's removable security cover, you will find studio-grade signal processing with fully variable crossover filters. Also included are our noise-killing, highly flexible differential-balanced inputs with remote level control capabilities via the HD-RLC remote level control (optional).

5-Channel Class D System Amplifier, 100 W x 4 + 500 W x 1

Thanks to its ability to act as a "one-box solution", the HD900/5 is ideal for installations where space is at a premium and sound quality is the paramount goal.

While extremely compact, this amazing amplifier will comfortably drive a complete high-performance car audio system: that is, four satellite speaker systems and a subwoofer system... with a very serious 900 watts of power!

Using our Single Cycle Control switching design and R.I.P.S. technology, the HD900/5 delivers 100 W x 4 to its four main channels, plus a very meaty 500 W to its subwoofer channel. Thanks to R.I.P.S., high power can be delivered over a wide range of load impedances, while the tight power supply regulation keeps distortion down, maximizing sound quality. From a pure sound quality perspective, we invite you to compare the real-world, in-car performance of this amplifier to any other amplifier on the market, of any type, at any price.

This amplifier features a brushed aluminum finish with black powder-coated cast alloy heat sinks and bottom panel. A black powder-coated, gasketed cover is also provided to protect the controls.

TECHNICAL DATA:

RMS Power @ 14.4V 100W x 4 @ 4Ω
75W x 4 @ 3Ω
75W x 4 @ 2Ω
75W x 4 @ 1.5Ω
200W x 2 @ 8Ω Bridged
150W x 2 @ 4Ω Bridged
500W x 1 @ 4Ω Sub Channel
500W x 1 @ 3Ω Sub Channel
500W x 1 @ 2Ω Sub Channel
500W x 1 @ 1.5Ω Sub Channel
Output Channels 5
Voltage 12V
Class D
Features Advanced Rollback Protection
Differential Balanced Inputs
R.I.P.S
Real Sink
Single Cycle Control
Fuse Rating 60A
Cable Gauge 4AWG
Amp Turn-On 12V
Frequency Response 12-28kHz
12-10k Sub Channel
Signal-to-Noise Ratio 108.5dB
Filter High-Pass
Sub Channel Low-Pass
Controller HD-RLC (Sold Separetely)
Input Channels 2 / 4 / 6
Input Type High Level
Low Level
Input Sensitivity Low Level 200mV-2V
Input Sensitivity High Level 800mV-8V
Height 4.9cm
Width 27.3cm
Depth 21.1cm