JL Audio HD900/5 HD Series 5-Channel 100W RMS x 4 at 4 Ohms + 5th Channel 500W RMS x 1, Class-D Car Amplifier with R.I.P.S. Power Technology and Single Cycle Control Technology
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What's Inside?
- • 5-Channel class-D full-range amplifier
- • Power/Ground/Turn-On plug
- • (3) Speaker connection plugs
- • Four mounting feet
- • 3mm Allen-wrench
- • 5mm Allen-wrench
- • Mounting bolts
- • Owner's Manual
Why Choose JL Audio HD900/5 5-Channel Amplifier?
Powerful, Space-Saving Amplifier for Premium Car Audio Performance
Elevate your car audio system with this compact, high-powered amplifier, delivering 900 watts of performance. It’s designed to drive four satellite speakers and a subwoofer, all from a single, space-saving unit. Perfect for installations where space is limited, it ensures premium sound quality without compromise. Enjoy clear, dynamic audio every time you hit the road.
Unmatched Sound Quality and Rugged Durability for Long-Lasting Performance
Crafted for unmatched in-car performance, this amplifier delivers high-quality sound rivaling any on the market, while its durable construction features a sleek brushed aluminum finish, rugged powder-coated heat sinks, and a gasketed cover to protect controls—built to perform and last.
Pristine Sound Quality with Single Cycle Control™ Technology
Experience the unparalleled performance of the HD900/5, featuring Single Cycle Control™ technology that delivers high-fidelity, full-range Class D amplification by precisely tracking and correcting audio signals over 400,000 times per second, ensuring pristine sound quality and outstanding efficiency.
Unleash Unstoppable Power and Performance with R.I.P.S. Technology
Unlock consistent power and superior sound quality with the HD900/5, featuring R.I.P.S. (Regulated, Intelligent Power Supply) technology, which ensures optimal power delivery across a wide range of battery voltages and load impedances, so you can enjoy incredible dynamics and stable performance no matter your setup.
Frequently Asked Questions (FAQ)
- • Why does my HD900/5 randomly cut out or shut off completely during heavy bass hits, even though my battery voltage is fine?
Due to R.I.P.S. technology, the amp pulls more current if voltage sags. If your power or ground wires are too thin or oxidized, this current spike trips protection. Use true 4-AWG pure copper (OFC) wiring and upgrade vehicle ground straps.
- • The status LED on my amplifier is blinking red/green or is solid red. How can I tell what the error code means?
A solid red light indicates a short circuit or blown voice coil. Unplug the speaker blocks from the side of the amplifier and cycle power; if the light turns green, the amp is fine and the short is in your vehicle's speaker wiring.
- • Why does my HD900/5 get incredibly hot to the touch compared to other Class D amplifiers?
The amp packs massive power supplies into a very compact chassis, concentrating heat. Ensure it is mounted horizontally or vertically with cooling fins unobstructed, leaving 1 to 2 inches of breathing space around it.
- • I only connected one pair of RCA cables to the main inputs, but my subwoofer channel isn't outputting any sound. What did I do wrong?
This is a signal routing oversight. When using a single pair of RCAs, you must set the "Input Mode" switch to "2 Ch." and toggle the "Sub Input" switch to "Int." (Internal) to feed signal to the subwoofer channel.
- • Why am I hearing a noticeable "hissing" sound or high-pitched alternator whine through my tweeters even when the radio volume is zero?
This baseline hiss happens if the "Input Voltage" switch is set to "Low" while receiving a high-voltage signal, forcing gains too high. Flip it to "High" if your radio outputs over 2V, and route RCAs away from main power lines.
- • Can I wire my 4 door speakers to 2 ohms per channel and still run a 2-ohm subwoofer on the 5th channel?
Yes. The regulated power supply design allows the subwoofer channel to deliver a full 500W RMS into any load from 1.5 to 4 ohms, while channels 1-4 can safely drop to 1.5 ohms without dropping performance.
- • I tried bridging Channels 1+2 and 3+4 to make a high-power 3-channel setup, but the amplifier immediately clips. Why?
Bridging increases the minimum allowable impedance threshold. You must use speakers with a minimum of 3 ohms (ideally 4 ohms) when bridging. Running 2-ohm speakers in bridged mode overloads the output stage and causes clipping.
- • Where is the onboard fuse located on this amplifier? I think I accidentally popped it during my install.
The HD900/5 has no onboard physical fuses due to its compact design. It relies entirely on an external inline fuse. You must install a 60-Amp inline fuse block along the main 12V power wire within 18 inches of the battery.
- • Why does the optional HD-RLC bass knob seem to do nothing or adjust the volume too abruptly?
This is usually caused by using a standard telephone or data cable instead of the original JL Audio wire. The HD-RLC requires a proprietary pin configuration; generic cables scramble the connection and cause dead zones.
- • How do I properly adjust the tuning controls if they are buried face-down when the amp is mounted?
The crossovers, switches, and gain dials are hidden under a security cover on the top faceplate. Because access is limited once mounted under a seat or panel, always calibrate your tuning settings before screwing the amp down.
- Number of Channels : 5
- Frequency Response : 12-28000 Hz
- Built In Crossovers : Yes
- Amplifier Class : D
- Fuse Rating : 60 A
- Promo : Yes
Features:
- Powerful 5-Channel Performance: Five-channel Class D amplifier delivering 75–100W RMS x 4 (front/rear) and 500W RMS x 1 (subwoofer) at 1.5–4 ohms, 20Hz–20kHz, with 108 dB SNR and 0.03% THD
- Bridge-Ready Output: Front and rear channels can be bridged to produce 150–200W RMS x 2 at 3–8 ohms
- Single Cycle Control™ Sound: Patented Class D technology engineered for reference-grade audio with ultra-low distortion
- Real-Time Signal Accuracy: Corrects the audio signal over 400,000 times per second for pristine amplification
- Compact Space-Saving Design: Chassis is 13% smaller and over ½-inch shorter than most Class AB amplifiers
- High-Efficiency Power Delivery: Up to 80% efficiency at half power with up to 60% less current draw than Class AB designs
- R.I.P.S. Consistent Power: Regulated Intelligent Power Supply maintains output across 1.5–4 ohms and 11–14.5V systems
- Smart Impedance Sensing: Automatically adapts to real speaker loads for optimal output and dynamics
- Voltage-Regulated Stability: Keeps rail voltage and clean power stable in real-world vehicle conditions
- RealSink™ Thermal Control: Advanced heat dissipation using convection and radiation cooling
- Rollback Overheat Protection: Safely reduces output during high temperatures without shutting down music
- Noise-Free Differential Inputs: Differential-balanced inputs eliminate noise and alternator whine
- OEM & Aftermarket Friendly: Directly connects to factory or aftermarket head units with selectable input voltage ranges
- Smart Status Monitoring: Single multi-color LED displays operating and protection states
- Low-Voltage Safety Shutdown: Complete shutdown occurs only if vehicle voltage drops below 10V
- Flexible Mounting Options: Supports standard corner mounting or included lateral mounting feet
- Secure Control Panel Cover: Protects amplifier settings while delivering a clean, professional appearance
- Easy Gain Setup: Predictable output power allows quick and accurate gain adjustment
- Versatile Signal Routing: Supports 2-channel, 4-channel, or 6-channel input configurations
- Precision Active Crossovers: Independent front, rear, and subwoofer crossovers with selectable slopes
- Wide Frequency Adjustability: Adjustable crossover range from 50–500Hz for detailed system tuning
- Subwoofer Protection Filter: Built-in 30Hz infrasonic filter preserves subwoofer performance and amplifier power
- Heavy-Duty Power Connections: Detachable power and ground connector supports 4 AWG wiring
- External Fuse Requirement: Requires an external 60-amp main power fuse (not included)
- Clean Speaker Connections: Detachable speaker output plugs accept 16–12 AWG speaker wire
- Independent RCA Inputs: Three sets of differential-balanced RCA inputs with individual gain controls
- Remote Level Control Ready: Optional wired remote enables in-dash subwoofer or master volume control
- Installer-Friendly Layout: All inputs and outputs located on one side for a clean, efficient install
Specifications:
- Power at 2 Ohms (Watts x Channels): 75 x 4
- Bridged Power (Watts x Channels): 150 x 2
- Minimum Impedance Bridged: 3
- Minimum Impedance Unbridged: 1.5
- Minimum Impedance: 1.5
- Best Frequency Response: 12-28K Hz
- THD at Rated RMS Power: 0.03%
- Signal to Noise Ratio: 108 dB
- Input Voltage: 14.5v
- UPC: 699440982238
- Weight: 9
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.
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Write a review!
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Excellent amp, good clean sound. Very happy so far. I have it in my 2009 370Z pushing Jl audio 12W6v2 sub and Boston Acoustic Pro60 se components.
Small and Powerful
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It was between this and Alpine's PDX5. So glad I went with this JL! It's smaller and way more powerful than the PDX5. This fit easily under the passenger seat and my system looks so clean. A little pricey, but I dare you to find 5 channel amp this small yet this powerful!
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I didn'tbuy the amp here, but this is the amp to get if you want the total package. This is a very powerful amp for the size. And very good for quality. I have it running a JL Audio 13tw5 and 2 sets of Pioneer 6.5" 4 ways in a 96' Tacoma regular cab. Everything is very loud and clear. I think the price increased here alil bit, but its worth it if you want 1 of the best.
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I have this in my 2010 Subaru Legacy 2.5GT Limited, this thing is a beast. Well worth the money for all of the power in a compact size. King kong aint got nothing on this. :)
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I've had many amps but this JL audio HD900/5 is awesome. This thing does not lack in power, plenty of it! The sound quality is top notch. I highly recommend this amp to anyone wanting a compact but powerful 5 channel amp. Got a great deal through Online Car stereo so that was a no brainer...
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Great product!!! Haven't had one issue yet.
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I absolutely love my JL HD900/5 amp. The clarity is amazing. The best part about this amp is you power your speakers and sub from one compact amp. I was able to do a very discreet and clean install because of the amps small size. The quick disconnects make the amp easy to tune and remove to work on the car. I also add the remote bass knob to the amp which allows you to adjust your bass level at the twist of a knob mounted right next to the head-unit. Tuning this amp is very straight forward thanks to its labeling and good instructions provided. I have had this in my car for around 2 years so far and have not had one problem. I am powering 10 speakers and 1 JLW6V2 off this amp. This will be my amp of choice for my future hot rod purchases because of its power and compact size. I have been a JL fan since I started getting into stereos in 2005 and continue to be because I have not had one issue with any of their products and appreciate there great customer support.
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Fast shipping can't complain thanks!
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Amp is solid with many features and sounds great when its working
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Great amp. JL audio continues to be the best in car audio. Can get really hot though.
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This is some premium amplifier from JL!!! You’ll never really go wrong with this one, although it might be a little bit expensive, but with all the things it can give you, it is really totally worth all the bucks. Everything is clean and balanced with this amp, and the sound quality is top notch!
