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Crutchfield

JL Audio HD Series HD900/5

5-channel car amplifier — 100 watts RMS x 4 at 4 ohms + 500 watts RMS x 1 (New Stock)

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  • JL Audio HD Series HD900/5

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  • JL Audio HD Series HD900/5

  • JL Audio HD Series HD900/5

  • JL Audio HD Series HD900/5

  • JL Audio HD Series HD900/5

  • JL Audio HD Series HD900/5

  • JL Audio HD Series HD900/5

  • JL Audio HD Series HD900/5

  • JL Audio HD Series HD900/5

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Our take on the JL Audio HD Series HD900/5

by Buck Pomerantz
JL Audio

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

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.

View of control panel

JL Audio technology goes to work for you

HD Series amplifiers reproduce your music with exceptional accuracy, so you'll hear 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 maximum power from minimum space. JL's wired remote allows you to control your HD amp's volume from your front seat.

your description goes here

Highlights:

  • 5-channel amplifer
  • 100 watts RMS x 4 at 4 ohms + 500 watts RMS x 1 (at 1.5-4 ohms)
  • 75 watts RMS x 4 (at 1.5-3 ohms) + 500 watts RMS x 1 (at 1.5-4 ohms)
  • 150 watts RMS x 2 bridged (at 3-6 ohms) + 500 watts RMS x 1 at (1.5-4 ohms)
  • variable high-pass filter on front and rear channels (50-500 Hz, 12 or 24dB/octave)
  • variable low-pass filter on subwoofer channel (50-500 Hz, 12 or 24dB/octave)
  • subsonic filter on sub channel (24 dB/oct at 30 Hz)
  • removable power and speaker plugs
  • optional wired remote for level control
  • Class D amplifier design
  • MOSFET power and output stages
  • differential-balanced inputs eliminate noise from your vehicle's electrical system
  • speaker- and preamp-level inputs (speaker-level input requires an optional adapter)
  • preamp outputs
  • 4-gauge power and ground leads and a 60-amp fuse recommended — wiring and hardware not included with amplifier
  • no onboard fuses — when installing multiple amps in a system, an additional 60-amp in-line fuse between the distribution block and the amplifier is recommended
  • 10-3/4"W x 1-15/16"H x 8-5/16"D
  • warranty: 2 years
  • Our 60-day money-back guarantee
 

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Performance
RMS Power Output (Watts x Channels)
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100 x 4
500 x 1
Peak Power Output (Watts x Channels)
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N/A
Power at 2 Ohms (Watts x Channels)
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75 x 4
Bridged Power (Watts x Channels)
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150 x 2
Minimum Impedance Bridged
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3
Minimum Impedance Unbridged
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1.5
Best Frequency Response
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12-28K Hz
THD at Rated RMS Power
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0.03%
Signal to Noise Ratio
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108 dB
Input Voltage
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14.5v
Features
Amplifier Class
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D
Low-Pass Crossover Frequency
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50-500Hz (ch 5)
Low-Pass Slope (dB/octave)
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12 or 24 dB/oct
High-Pass Crossover Frequency
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50-500Hz (ch 1-4)
High-Pass Slope (dB/octave)
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12 or 24 dB/oct
Bass Boost
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No
Bass Boost Frequency
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N/A
Fan Cooled
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No
Fuse Rating
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60
Speaker Level Inputs
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RCA (adapter req)
Preamp Outputs
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No
Width (inches)
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8-7/8
Height (inches)
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2
Depth (inches)
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10-13/16
Parts Warranty
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2 Years
Labor Warranty
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2 Years
Product Research
What's in the box?

Download owner's manual

  • 5-Channel class-D full-range amplifier
  • Power/Ground/Turn-On plug
  • 3 Speaker connection plugs
  • 3mm Allen-wrench
  • 5mm Allen-wrench
  • Mounting bolts
  • Owner's Manual

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Controls
Connections

Features

Five-Channel Full-Range Amplifier: The JL Audio HD900/5 is a Class D five-channel, full-range amplifier that is rated at 75 to 100 Watts RMS x 4-channel (front/rear) and 500 Watts x 1-channel (subwoofer) in 1.5-4-ohm at 20 to 20kHz with a signal-to-noise-ratio of 108 dB and a total harmonic distortion of 0.03% while receiving 11 to14.5 Volts. The front and rear channels of the amplifier can also be bridged to output 150-200 Watts RMS x 2-channel in 3 to 8-ohms.

High-Fidelity Class D (HD) With Single-Cycle Control: The JL Audio HD900/5 utilizes patented Single Cycle Control Class D technology for all channels. This technology delivers reference-grade sonic performance while requiring far less current from the vehicle's electrical systems than a conventional amplifier. Single Cycle Control is a unique approach to controlling a full-range Class D amplifier. By tracking the audio signal, comparing it to the real PWM waveform and then correcting it in each and every cycle (over 400,000 times per second), a multitude of distortion-causing mechanisms can be tightly controlled to enable pristine amplification. While there are certainly less expensive ways to make a full-range switching amplifier, no other Class D control system works faster or more accurately than Single Cycle Control.

Compact/Efficient Design: The JL Audio Class D amplifier on average is 13% smaller overall and over 1/2-inch shorter in height than most class AB amplifiers. The HD900/5 features outstanding overall efficiency (80% at 1/2 rated power) which allows for huge power from a tiny chassis and is easy on your vehicle's charging system, drawing 60% less current than a class AB design of equal power.

R.I.P.S. (Regulated, Intelligent Power Supply): R.I.P.S. stands for "Regulated, Intelligent Power Supply" and is a central feature of the JL Audio's JL Audio HD amplifier. The JL Audio R.I.P.S. System ensures consistent power delivery over a wide range of battery voltages and load impedances. This technology provides optimum power at any impedance level between 1.5 ohm to 4 ohm per channel and at any vehicle voltage level between 11V and 14.5V.

  • Regulated Power Supply: "Regulated" means that the power supply adjusts its operation so as to maintain the amplifier's rated power output and low distortion operation over a wide range of vehicle voltages (11V-14.5 V). This allows the JL Audio JL Audio HD amplifier's the rail voltage and clean power output to remain stable in real-world car-audio systems, resulting in superior fidelity and stability.
  • Intelligent Power Supply: The "Intelligent" portion of the R.I.P.S. System is a circuit that actually monitors output current to optimize the amplifier's output power over a wide range of load impedances (1.5 ohm to 4 ohm per channel). The R.I.P.S. System detects the actual impedance being driven and adjusts output rail voltages to deliver optimum output. The entire process is seamless, automatic, and results in incredible dynamics for satellite channels and consistent power output for a wide range of subwoofer configurations. It also takes into account the real impedance of your car-audio system, rather than relying on often inaccurate assumptions based on a speaker's rated impedance.

RealSink Heat Management With Rollback Protection: This JL Audio amplifier employ and advanced type of heat management, called RealSink. This features takes advantage of convection and radiation effects to remove heat from the amplifier circuitry. For optimum cool performance, the vertical heat sinks located at the sides of the amplifier should be exposed to as large a volume of air as possible. If a JL Audio HD amplifier should ever reach an unsafe temperature, its unique Advanced Rollback Protection circuit also adjusts power until the amplifier cools down, without ever shutting your music down.

Differential-Balanced Inputs: The JL Audio amplifier features differential-balanced input architecture to effectively control noise and ensure compatibility with a wide variety of source units, including many OEM systems. Without resorting to line output converters, you can directly connect most OEM source units to the JL Audio amplifier without creating any noise or compatibility issues. Unlike conventional single-ended inputs, the differential-balanced design does not connect one side of the audio signal to chassis ground. This eliminates any voltage sensitivity between one input terminal and ground and greatly reduces the incidence of alternator whine in a typical car audio installation. The JL Audio HD amplifier provides range switching on each of its inputs via the "Input Voltage" switch. This permits connection to a wide range of source voltages while retaining excellent sensitivity setting precision.

Note: You will need three speaker wire to RCA adaptors (136XDCLR2S, sold separately) to connect this amplifier to your headunit via speaker-level.

Protection Circuitry With Status Indicator Lights: There is a single multi-color LED on the control panel of the amplifier to indicate the amplifier's operating status.

  • Flashing Green: When the LED is flashing green, the amplifier is powering up and audio output is muted.
  • Constant Green: This LED lights green to indicate that the amplifier is turned on and operating normally.
  • Constant Red: This Red LED lights to indicate that the amplifier has exceeded its safe operating temperature, putting the amplifier into a shelf-protection mode, which reduces the power output of the amplifier. The red light will shut off and the amplifier will return to normal, full-power operating mode if the heat sink temperature drops back to a safe level.
  • Constant Yellow: This amber LED lights to indicate that the impedance of the speaker load connected to the amplifier is lower than the optimum impedance load range for the amplifier. When this light is on, a protection circuit engages and reduces the power output of the amplifier. The amber indicator will also light when a short-circuit is detected in the speaker wiring.
  • Alternating Red/Green: The LED alternated between Red and Green to indicate that the amplifier is experiencing a fault that may require service of the amplifier, its wiring, or the vehicle's operating system. Audio is muted when this fault occurs.

Note: There is only one condition that will shut down the HD900/5 completely and that is if the battery voltage of your vehicle drops below 10 volts.

Mounting Options: The HD900/5 has two mounting option to choose from during installation.

  • Standard Mounting: The standard method of mounting requires removal of the four corner caps with the included hex-wrench. Using the appropriate mounting screws (not included), you can then secure the amplifier in all four corners and replace the corner caps.
  • Lateral Mounting Feet: Lateral Mounting Feet are also included with the HD900/5 to provide an alternative mounting option. Each mounting foot should be attached to the bottom of the amplifier by screwing the provided bolts into the bottom of the amplifier and up into the corner cap with the supplied hex-wrench.  Then, using the appropriate mounting screws (not included), you can secure the amplifier by its four lateral mounting feet.

Controls

Control Panel Cover: The HD900/5 features a Control Panel Security Cover which protects and hides the amplifier's controls. When installed, the cover ensures that the amplifier's settings are not accidentally changed while creating a clean aesthetic look for the amplifier and your installation. The control panel security cover is pre-installed at the factory and must be temporarily removed for access the amplifier's controls. The security cover is secured by a single hex-head screw.

Simplified Gain Setting: The amplifier's R.I.P.S. feature also allows for easy gain setup. Because the amplifier will always deliver the same amount of power within its operational range of impedances and supply voltages, the maximum, unclipped output is very predictable. This makes setting the gain level of the amplifier via the input sensitivity control very simple. All you need is Digital AC Voltmeter (142TK12V, sold separately) and a Test CD Disc (503CD104, sold separately) with a sine-wave test-tone recorded at 0 dB reference level in the frequency range to be amplified for that set of channels (50 Hz for subwoofer channels, 1 kHz for a midrange application).

Flexible Input Section And Active Crossover Network: The JL Audio HD amplifier provides a flexible input section and a comprehensive crossover network to fine tune your system effectively and accurately. The variable filter design employed in the JL Audio HD amplifier crossover sections allow you to seamlessly switch slopes, easily change filter frequencies and address what frequencies the preamp outputs will pass. The HD900/5 offers the following independent crossover adjustments for the front, rear, and subwoofer channels along the unit's front panel, behind a removal cover plate.

  • Input Mode: This switch allows operation of all five amplifier channels with only one pair of input signals (2ch); with independent front and rear input signal pairs (4ch); or with discrete front, rear, and subwoofer signal pairs (6ch).
  • Input Voltage: This switch allows you to choose between using a low-level input signal (200mV-8V) or high-level input signal (200mv-2V).
  • High-Pass or Low-Pass Filter: The HD900/5 has three individually adjustable filter controls for the Front, Rear, and Subwoofer channels. The Front and Rear filters are high-pass filters (attenuate low frequencies), while the Subwoofer channel filter is a low-pass filter (attenuates high frequencies). For each filter, you can select from a shallow (12dB/oct) filter slope or a more aggressive (24dB/oct) slope.
  • Filter Frequency: This control selects the frequency at which each high-pass or low-pass filter begins to attenuate the signal and refers specifically the frequency at which output has been attenuated by -3dB. You can select from 50-500Hz.
  • Infrasonic Filter (subwoofer only): The Infrasonic Filter is a 24-dB/oct high-pass filter, with a fixed cutoff frequency of 30Hz. This filter is designed to conserve amplifier power and protect subwoofer systems, without audibly degrading the subwoofer's bass output.

Connections

Power/Ground/Turn-On Plug: The amplifier features a Power/Ground/Turn-On plug which detaches from the amplifier to make connecting your power, ground, and remote turn-on lead wires more convenient. Once your connections are made the Power/Ground/Turn-On connector simply plugs into the amplifier.

  • Power and Ground: The JL Audio amplifier's set-screw Power and Ground connections found on the detachable Power/Ground/Turn-on plug are designed to accept 4 AWG power wire. A hex-wrench is supplied for making connections.
  • Remote Turn-On: The JL Audio HD amplifier's set-screw turn-on lead found on the Power/Ground/Turn-on plug will accept 18 to 12 AWG wire. A hex-wrench is supplied for making connection.

Note: The Amplifier is not equipped with a fuse. An external 60-amp AFS, AGU, or MAXI fuse (not included) must be installed on the power wire. If a wiring kit is used which includes a fuse with a value other than 60-amps, the original should be replaced with a 60-amp fuse

Speaker Output Plugs: The amplifier features three Speaker Output plugs (Front/Rear/Sub) which detach from the amplifier for easier speaker wire connection. Once your speaker wires are connected to these plugs, they simply push into the amplifier. The front and rear speaker output plugs feature four set-screw terminals, while the subwoofer speaker output plug features two set-screw terminals. The HD900/5 amplifier's ten set-screw speaker terminals found on the Speaker Output plugs will accept 16 to 12 AWG speaker wire. A hex-wrench is supplied for making connections.

Preamp Inputs: The amplifier features three sets of differential-balanced RCA jack inputs (Front/Rear/Sub). The amplifier features a dedicated Input Sensitivity gain control for the front, rear, and subwoofer channels of the amplifier. These controls are designed to match the input sensitivity of the HD900/5 to the specific signal source that is feeding it. The amplifier's input level can be set independently for the front and rear channels to Low (200mV-2V RMS) when connecting the amplifier to a low-level preamp signal or set to High (800mV-8V RMS) when connecting the amplifier to a high-level speaker signal.

Remote Level Control: The amplifier features a standard telephone connector for adding an optional wired remote level control. With the addition of the optional wired Remote Level Control (136HDRLC, sold separately), you can control the volume of one or both channel pairs of the HD900/5 form the front of your vehicle. This is useful for subwoofer level control or even as a master volume control for your system. If desired, multiple HD amplifiers can be controlled from a single HD-RLC controller using a simple phone line splitter and multiple phone cables (all sold separately).

Note: All inputs and outputs are located on the rear side of the amplifier to make installation of the amplifier simple and neat.

 
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JL Audio HD Series HD900/5 Reviews

Average Customer Review:

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5 out of 5

Love the clarity, power and small size

Written By Shillydwagon, Denver, CO on Tuesday, December 17, 2013
Crutchfield Customer Review (What's this?)
 
I replaced a JL 500/5 and a 250/1 powering 4 satellites and 2 subs with this amp. I also moved down to one sub. I am very happy with the sound. the extra 150W to the rear speakers makes quite a difference. The amp seems a lot cleaner than the 500/5, but that could be the extra power to the rears. I set the front and sub crossovers to 80Hz, the rear crossovers to 120Hz, and adjusted the levels per the manual. I have not touched them since and have no plans to. I am very happy with the sound.

The modular plug-ins makes install much easier. Like the adjustments being on the opposite side, makes for easier access in my install.
Pros:
Clean sound. Very small chassis for a 900W amp. Great power for a whole system amp. Easy adjustments. Clean and easy install.
Cons:
Cons....cons.... um... Oh! The subsonic filter! Yes, i had to think to come up with something. Why place it at 30hz?!?! (Yes, i know it's for ported boxes.) I would have like it adjustable, or selectable at 20Hz-30Hz. I have a ported enclosure, the HO110RG-W3v3, and it seems to not be as full with the filter on. I think 20Hz would have been perfect. This is a very minor gripe and really not an issue, still a 5 stars amp!
4 out of 4 people found this helpful
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5 out of 5

Powerful amp

Written By Mike, New Jersey on Monday, July 01, 2013
Crutchfield Customer Review (What's this?)
 
This amp was a great purchase for what I was looking for. I have a 4 door wrangler and was upgrading the sound system when I ran into the problem of what kind of amp to get. I wanted to power my 4 speakers from the amp but also wanted a sub that had some power. This amp was able to power my C5 650s in the front and C3 650s in the sound bar with the TW5V2 in the stealth box. Perfect size to fit under the seat and more than enough power to keep me happy.
Pros:
Powerful Compact 5 channel great for sub and speakers
Cons:
Price
4 out of 4 people found this helpful
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5 out of 5

Very powerful little amp

Written By Nelson, South Fl. on Tuesday, May 21, 2013
 
Had too turn the gains down. Too loud for me. I was looking for a good small amp that fit under the seat. I have a very small car and battery but the amp doesn't seem to mind. Very few adjustments had to be made to get the type of sound quality I was looking for. Even the Eq. on the head unit is almost flat. Great job JL. And Thank You Crutchfield employees for putting up with all my questions. B.T.W. purchase the bass knob, it's a must!
Pros:
Lots off power, small, easy set up.
Cons:
A little pricey.
3 out of 3 people found this helpful
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5 out of 5

Finally Size does not matter

Written By 2010Nitro, Woodbury, MN on Friday, May 03, 2013
 
I dont really know all the "tech mumbo jumbo". But here is my System, Im running the factory head unit (the 6" touch screen head unit) and this is running into a lower level 6 CH. line output(audiocontrol LC6I) into the JL HD900/5 This amp is powering two sets of Facal P165V15 components which are darn good speakers at $500 a pair. And also powering my 2 JLW3s subs. The shop that installed this said that they were impressed with the actual power this amp puts out when tuned correctly. Ive ran many different type of amp in the past. mostly a four CH. and a Mono amp for all of my systems, and my previous subs and speakers were a lot less then what i have now. I dont think I will ever run anything but a five ch JL . The awesome sound and power you get combined with the unreal small size of this amp makes it and easy choice.
Pros:
Small size and power
Cons:
when i find one I'll let you know
2 out of 2 people found this helpful
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5 out of 5

Powerful, Small, Reliable

Written By Andrew C., Great Falls, Montana on Friday, November 23, 2012
Crutchfield Customer Review (What's this?)
 
Very small footprint. Lots of power for its size. The HD900/5 is pushing front/rear Focal 130KR's with 10" sub. This is a perfect amp to power an entire system. Sound is clean. One thing I would like to point out (to my surprise) is the fact that there are a lot of YouTube videos pairing HD Series amplifiers with Focal components; event with the high dollar Utopia Be No.5. That is a bold statement regarding this amplifier. I recommend you use the proper metering equipment to set the gains/crossovers properly to be rewarded with clean, reliable and loud music. Applying sound deadening is like adding icing to the cake. In my garage,I tested the HD 900/5 by playing hip-hop for almost 100 minutes (power supply used) at 90% volume (only 90% because I was nervous about my component speakers). WOW! This amp did not shut down OR go into "protect" mode. Amplifier housing was warm/hot but that is to be expected after over 1.5 hours of playing. This amp is under rated and will certainly complement any 6x9, 6.5, 5.25 or component speaker set. Now I'm confident to open up my truck doors and play some music at BBQ's and family gatherings. There are higher priced amplifiers for the same or less amount of power but anything beyond the HD900/5 and you will start to pay more and get less...the point of diminishing returns.
Pros:
>Very flexible >Highly adjustable: high/low level inputs, high/low pass filters >Small footprint >Does not get as hot compared to traditional AB amplifiers
Cons:
>Would like to see the JL Audio logo lit. >Performance will tempt you to buy another
9 out of 9 people found this helpful
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5 out of 5

Perfection

Written By Curt L, Sacramento, CA on Thursday, June 28, 2012
Crutchfield Customer Review (What's this?)
 
This small amp has the ability to power 4- JL Audio C2-690, 2- C2-075 tweeters and a W3V3 12 inch sub. Amazing sound in a small package. This single amp does the work of two amps in an exceptional manner. My car is a concert hall thanks to this amp and the components it powers.
Pros:
Great sound, small package, One amp to power the entire system, stealth.
Cons:
none
3 out of 3 people found this helpful
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4 out of 5

Huge sound, small package!

Written By Gil, Columbia SC on Friday, January 06, 2012
Crutchfield Customer Review (What's this?)
 
This is a great amp for the money. Chose this over the smaller XD line and I have no regrets. Power goes to bi-amping a Focal 3 way set in the front and two tens in the back. It sounds like nothing, which is what amps should sound like, completely transparent. Top audio competitors are using this line of amps and that says a lot. I bought the open box version and saved a hundred bucks. It came exactly the same as if it were new, not one bit of difference. Highly recommended!
Pros:
Awesome sound and power.
Cons:
You get what you pay for....
7 out of 8 people found this helpful
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5 out of 5

Awesome Amp

Written By 2004wjmedic, Cullowhee, NC on Saturday, July 16, 2011
 
This is a great amplifier and my third JL Audio amp. I have the amp powering 4 JL Audio XR650 speakers C5 tweeters and a 10w7v2 subwoofer. I could not be happier with the power that this amp can pump out. It runs fairly cool and I have yet to be able to force it into a protect mode with long listening sessions at high volumes. Another plus is this amp is SMALL. I have it tucked away under the back seat in the factory location. If you buy this amp it, you will not be disappointed! Yes it is expensive but it is worth every penny.
10 out of 10 people found this helpful
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5 out of 5

True Power Ratings

Written By kevin, Minnesota on Monday, September 27, 2010
 
This amp gives you true rated power across a wide range of supply voltages, and in a compact chassis. The sound quality is superb, but again it always makes the rated power and stays cool. Paper specs do not do justice, this amp is worth every penny, it is that good.
8 out of 8 people found this helpful
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5 out of 5

Awesome

Written By Zach, colorado springs on Sunday, September 05, 2010
Crutchfield Customer Review (What's this?)
 
I have this amp pushing a 8w7. Everyone thinks i have 2 12's. it's also powering my to alpine component sets. It all sounds great..one of the cool things this amp does is it don't leave you with out music when it over heats it just turns the power down. so long as you turn your stereo down it will continue to sound great. I can't say enough about this amp it's simply awesome.
9 out of 9 people found this helpful
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5 out of 5

exceptional

Written By Grant, kc, mo on Saturday, April 17, 2010
Crutchfield Customer Review (What's this?)
 
This amp is seriously sick! i got a JL audio stealth box for my 07 mustang which has a 13w6 in it. I was using an amp that was supposedly pushing 850w rms to it but this thing is definitely louder and cleaner. I haven't hooked it up to my speakers yet, but i already know its gonna sound amazing. If you want a one amp solution to power your whole system, do yourself a favor and check this one out.
5 out of 24 people found this helpful
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5 out of 5

Great value and performance

Written By Jason, Hawaii on Sunday, October 25, 2009
Crutchfield Customer Review (What's this?)
 
After looking at Alpine and JL Audio digital amps for a while, JL finally came out with a perfect 5 channel that fit my needs. I swapped out two amps for one. And this one JL has great power. The sound is extremely clean, though the bass is not as loud as my old MTX mono amp that was rated the same at 1x500. But I didn't mind since I was trying to clean the bass to a more tight sound. I got new Focal polyglass 6.5 components, and pure heaven. Sound is amazaing. Focal and JL are top notch. Subs are 2 Infinity 12 inch Perfects combined to 2 ohms. I am still thinking about scaling down size to one 10 inch JL W6 and slamming that small sub hard. Amp gets hotter than expected. The size is unbelievably small. Get a great complete set-up in one small amp! Solid
13 out of 14 people found this helpful
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5 out of 5

Outstanding

Written By Goldfish, TX on Tuesday, October 13, 2009
 
I recently swapped my JL 300/2 and 500/1 for a HD600/4 and this HD900/5 and the difference is incredible. Sound quality is amazing and the space requirements are very minimal. The 10w3 woofer in a sealed box I have running off of the sub channel seems more precise and less "boomy" and I use the other channels bridged to a set of JL C5 components for the back doors. The sound quality on the back speakers is superb as well. This amp does seem to run a little bit warmer than the amps I had before, but I've had zero problems with either amp even after many continuous hours of loud volume levels. Overall, this amp and its 600/4 counterpart are worth every penny.
14 out of 16 people found this helpful
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1 question already asked

My head unit requires a external amp. So can I use this for my dex- p99rs and 4 components instead of a subwoofer? [ Ricardo  Feb 26, 2014 ]
1 answer
  • Thanks for your question. For information on selecting the best amp I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system. [ Krissy Staff  Feb 26, 2014 ]

Add accessories for the JL Audio HD Series HD900/5

You'll need an amp wiring kit to install your new amplifier, as wiring is not included. See all categories & accessories

EFX 4-gauge Amplifier Wiring Kit Power and signal connections for your new amp
70 people say
Your Price: $79.99
Add to Cart
Rockford Fosgate RFK4 4-gauge amplifier power wiring kit
6 people say
Your Price: $114.99
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Rockford Fosgate RFK4X Complete 4-gauge amplifier wiring kit
Includes patch cable and speaker wire
9 people say
Your Price: $159.99
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T-Spec 16-gauge Speaker Wire Black/white jacket — priced per foot
9 people say
Your Price: $0.69
Add to Cart
T-Spec 12-gauge Speaker Wire Black/white jacket — priced per foot
17 people say
Your Price: $1.99
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Stinger PRO Series 16-gauge Speaker Wire Black jacket — priced per foot
37 people say
Your Price: $0.39
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JL Audio XD-CLRAIC2-SW 2-channel speaker output converter (bare speaker wires to male RCAs)
11 people say
Your Price: $9.99
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Kicker KISL 2-channel speaker wire adapter (bare-wire connector to RCAs)
6 people say
Your Price: $12.99
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T-Spec 2-Channel RCA Patch Cables Available in 7 different lengths (20-foot)
13 people say
Your Price: $20.99
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5 people say
Your Price: $29.99
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44 people say
Your Price: $9.99
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JL Audio HD-RLC Remote level controller for select JL Audio amplifiers
13 people say
Your Price: $34.99
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Rockford Fosgate RFFM60 MAXI Fuse Pair of 60-amp platinum-plated wafer fuses
1 person says
Your Price: $4.99
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EFX CAFH Fuse Holder In-line AGU fuse holder accepts 4/8-gauge wire
1 person says
Your Price: $12.99
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Rockford Fosgate RFFAGU Fuse Holder Platinum-plated AGU fuse holder
Fits 4- or 8-gauge cable
21 people say
Your Price: $10.99
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T-Spec Capacitor 1.5-farad capacitor with red LCD meter
3 people say
Your Price: $79.99
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Metra Crimp Tool and Connectors Package contains crimp tool and over 150 pieces
10 people say
Your Price: $19.99
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S&G Wire Cutter/Stripper Tool Cuts and strips 12- to 22-gauge wire
12 people say
Your Price: $19.99
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S&G Tool Aid 87650 Door Trim and Panel Removal Tool
63 people say
Your Price: $9.99
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Pro.Fit Wire Worm Installation tool helps route wiring through tight spaces
25 people say
Your Price: $12.99
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Bojo Trim Panel Tools Set of 6 pry tools — helps remove interior and exterior trim and door panels
42 people say
Your Price: $24.99
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Skewdriver Pro SPK4042 Ratcheting straight and offset screwdriver set with 40 bits (Skewdriver Pro with ratchet handle, pictured)
7 people say
Your Price: $49.99
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Bojo Trim Panel Tools Set of 6 pry tools — helps remove interior and exterior trim and door panels
1 person says
Your Price: $29.99
Add to Cart
DEI Heat Shrink Tubing Black 4-foot length (Assortment)
4 people say
Your Price: $24.99
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Your Price: $69.95
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For a more in-depth review and enhanced detailed information on the JL Audio HD Series HD900/5, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_136HD9005/JL-Audio-HD-Series-HD900-5.html ).