JL Audio HD900/5 900W 5-Channel Class D, HD Series Small Profile Amplifier with R.I.P.S. Technology

Small amps, big power

JL Audio's HD Series amplifiers offer high performance from an ultra-compact chassis. These Class D amplifiers use less power, take up less space, and generate less heat than traditional amp designs — you can even stack them up to create a sweet-looking installation.

---

JL Audio technology goes to work for you

HD Series amplifiers reproduce your music with exceptional accuracy, so you'll hear a high-fidelity sound even under the most demanding conditions. JL Audio uses Single Cycle Control™ technology to eliminate the excessive signal distortion that's plagued Class D amplifiers in the past. Differential-balanced inputs eliminate noise before it hits the preamp stage, and allow you to connect the amp to just about any in-dash stereo. You'll hear clear, true, studio-quality audio, exactly what you expect from JL Audio.

Power your entire system with one compact amp

The 5-channel HD900/5 amplifier pushes 100 watts RMS per channel to your front and rear full-range speakers, plus 500 watts RMS to a sub — all from a 2" tall chassis that's about the size of a sheet of computer paper. Or, you can bridge the front and rear channels to drive 150 watts RMS into two speakers, while still running your sub at 500 watts.

The regulated power supply allows this amp to deliver its rated power to a wide range of impedances, even when voltage levels drop during heavy use. Removable power and speaker plugs make it easy to pop this amp out if you need the space in your cargo area.

---

Some extra touches

You can use JL Audio's optional stack kit to mount one HD Series amp on top of another, so you can maximise power from minimum space. JL's wired remote allows you to control your HD amp's volume from your front seat.

Product Features:

• JL Audio HD Series 5-Channel Class D Amplifier
• ¹Main Channels RMS Power Rating (11V-14.5V):
• 4 ohms: 100 watts x 4 chan.
• 3 ohms: 75 watts x 4 chan.
• 2 ohms: 75 watts x 4 chan.
• 1.5 ohms: 75 watts x 4 chan.
• ¹Bridged RMS Power Rating (11V-14.5V):
• Bridged, 8 ohms: 200 watts x 2 chan.
• Bridged, 6 ohms: 150 watts x 2 chan.
• Bridged, 4 ohms: 150 watts x 2 chan.
• Bridged, 3 ohms: 150 watts x 2 chan.
• ¹Subwoofer Channel RMS Power Rating (11V-14.5V):
• 4 ohms: 500 watts x 1 chan.
• 3 ohms: 500 watts x 1 chan.
• 2 ohms: 500 watts x 1 chan.
• 1.5 ohms: 500 watts x 1 chan.
• Class D, switching type with patented Single-Cycle Control technology
• Pulse width modulation-regulated switching power supply
• LED power (green), protect (red) and low impedance (amber) indicators
• Removable Power/Ground and Speaker connectors
• Brushed aluminum finish chassis
• Compact, stackable chassis design
• Black powder-coated, gasketed cover
• RealSink Vertical, cast alloy fins effectively dissipate heat
• Advanced Thermal Rollback protection system
• R.I.P.S. - Regulated, Intelligent Power Supply
• Single Cycle Control - high-fidelity, full-range Class D
• Compares the real PWM waveform and then corrects it in each and every cycle
  (over 400,000 times per second)
• 80% efficiency at 1/2 rated power for the whole amplifier, including its power supply
• 60% less current draw than a typical Class A/B car amplifier of equal power
• Less generated heat, smaller chassis than a similarly powerful Class A/B design.
• Noise-killing, highly flexible differential-balanced inputs
• Speaker level inputs via RCA JL Audio XD-CLRAIC2-SW required and sold separately
• ²Remote bass level input JL Audio HD-RLC required and sold separately)
• Optional stacking equipment for HD amplifiers: JL Audio HD Stack Kit
• Selectable input voltage/sensitivity:
• Low level: 200mV - 2V
• High level: 800mV - 8V
• Selectable input modes: 2 Ch. / 4 Ch. / 6 Ch.
• Selectable State-variable slope: 12 dB/octave Butterworth or 24 dB/octave Linkwitz-Riley
• Cutoff Freq. Range: Continuously variable (All Ch): 50 - 500 Hz
• Selectable Infrasonic Filter (Sub Ch): Off / 30 Hz
• Total Harmonic Distortion: <0.03% @ 4Ω per main ch., <0.05% @ 4Ω sub ch. (Average at 1kHz)
• Signal to Noise Ration: (20 kHz bandwidth)
• Referred to Rated Power: 108 dBA
• Referred to 1 Watt: 88 dBA Frequency response: 12 - 28,000 Hz (+0, -1 dB)
• Damping Factor Ch. 1-4: >400 @ 4Ω/50 Hz, >200 @ 2Ω/50 Hz
• Damping Factor Sub Ch.: >800 @ 4Ω/50 Hz, >400 @ 2Ω/50 Hz
• Recommended fuse rating: 60A x 1 (inline, not included)
• Dimensions: 10.74"L x 7.85"W x 1.93"H
• ³4 gauge OFC power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier 
• UK Internet Dealer
• 1-year Manufacturer's Warranty