JL Audio MHD900/5 | 5-Channel Class-D Marine Amplifier

JL Audio MHD900/5

900W 5-Channel Class D, MHD Series Small Profile Marine Amplifier with R.I.P.S. Technology

900W 5-Channel Class D, MHD Series Small Profile Marine Amplifier with R.I.P.S. Technology

• Full-Range RMS: 100W x 4 @ 4 ohms, 75 x 4 @ 3-1.5 ohms
• Subwoofer RMS: 500W x 1 @ 4-1.5 ohms
• R.I.P.S. - Regulated, Intelligent Power Supply
• Single Cycle control - High Fidelity Class D
• Dimensions: 10.74"L x 7.85"W x 1.93"H




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BUNDLE AND SAVE (3 offers)

FREE set of NVX XIV65 6-Channel RCA Cables when you purchase a qualifying 5 or 6 Channel Amplifier. Simply press the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

JL Audio MHD900/5

100% off

Priced separately $1,584 98

Bundle Savings of $34 99

Total bundle price:

$1,549 99

For a limited time - while supplies last - get an instant 5% off the JL Audio Remote Bass Knob Control used to adjust the level of your amplifier from the front of the vehicle. This offer cannot be combined with any other offers.

JL Audio MHD900/5

5% off

Priced separately $1,604 98

Bundle Savings of $2 75

Total bundle price:

$1,602 23

A Quick and Easy Add-on. Turn your amplifier into a Bluetooth Amp with the JL Audio MBT-RX, Marine-Rated Bluetooth Receiver. This offer cannot be combined with any other coupons or offers.

JL Audio MHD900/5

10% off

Priced separately $1,594 98

Bundle Savings of $4 50

Total bundle price:

$1,590 48

JL Audio

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JL Audio MHD 5-Channel Class D Marine Amplifier

JL Audio MHD 5-Channel Class D Amplifier

JL Audio's Flagship Series of amplifiers offer unmatched performance from an ultra-compact chassis. These Class D amplifiers require less power, generate minimal heat and take up far less space than the common amplifier design. MHD Series amplifiers reproduce your music with outstanding accuracy, providing high-fidelity sound even under the most demanding conditions, thanks to a number of JL Audio exclusive technologies. Single Cycle Control (U.S. Patent #6,084,450), R.I.P.S System and Advanced Rollback Protection are just a few of the technologies that sets the MHD Series apart from the rest of the market, all designed to deliver top-flight audio performance. In addition, behind every MHD's removable security cover, you will find studio-grade signal processing with fully variable crossover filters to properly tune in your setup and put all the technology under the hood to good use. This marine amplifier features white and gray powder-coat finishes, a gasketed cover for the controls and stainless steel hardware for durability in the marine environment.

Also included are JL Audio's noise-killing, highly flexible differential-balanced inputs with remote level control capabilities for the subwoofer channel via the HD-RLC remote level control (sold separately).

Advanced Rollback Protection + RealSink

Advanced Rollback Protection

JL Audio's signature Advanced Thermal Rollback protection system eliminates annoying thermal shutdown events to keep the music playing, even under the most demanding conditions. Should the amplifier reach an unsafe operating temperature, a special circuit rolls back peak power output, without changing gain, until the amplifier cools down to a safe operating temperature. The red "Thermal" LED will light to indicate this condition has been reached. Once the amplifier cools down, the circuit restores full peak power output and the red "Thermal" indicator reverts to its normal state. The operation of Advanced Rollback Protection is inaudible in most cases.

R.I.P.S. System

R.I.P.S. System

The MHD900/5 employs JL Audio's exclusive Regulated, Intelligent Power Supply (R.I.P.S.) design. This sophisticated power supply allows the amplifier to produce high power over a wide range of speaker impedances. Unlike conventional amplifiers that require a specific impedance to produce optimum power, the R.I.P.S.-equipped MHD900/5 gives you the freedom to use a variety of speaker configurations without sacrificing power output or sound quality. The operation of the R.I.P.S. circuitry is entirely automatic and adjusts itself every time the amplifier is turned on according to the lowest impedance present at the speaker load.

JL Audio MHD Controls

JL Audio MHD Inputs

MHD900/5 Features:





  • JL Audio MHD 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
  • Gray powder-coat finish
  • Gasketed cover over control board
  • Stainless steel hardware
  • 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
  • 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 MHD 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 kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty

Check out the JL Audio MHD900/5 Owner's Manual

Notes from JL Audio:
  • ¹If 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.
  • ²When 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.
  • ²The 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.
  • ³We do not recommend the use of "copperclad aluminum wire" or "CCA" wire because this wire is significantly less conductive than pure copper wire. Only use pure copper power wire, such as JL Audio's Premium Power Wire. Tinned copper wire (silver color) is acceptable as the tin-plating is only a very minor component of the wire.
  • ³The MHD900/5's "+12 VDC" and "Ground" connections are designed to accept 4 AWG power wire. 4 AWG pure copper wire is the minimum recommended wire size for this amplifier. Use of smaller gauge wire (including cheap wire that is fraudulently sold as 4 AWG wire) can create a fire hazard.

This item is currently not eligible for our low price guarantee. This may be due to supply constraints, manufacturer restrictions, or another reason. We're always here to help you get the best price possible so give us a call or email today. Our experts will do their best to build the system that works for you within the rules.

Power Specifications - Full Range Channels
RMS Power @ 4 ohms
100 watts x 4 channels
RMS Power @ 2 ohms
75 watts x 4 channels
Bridged RMS Power
150 watts x 2 channels
Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
500 watts x 1 channels
RMS Power @ 2 ohms
500 watts x 1 channels
Amplifier Specifications
Amplifier Series
MHD (JL Audio)
Marine Certified
Amplifier Class
Number of Channels
Total RMS Power Output
900 watts
Maximum Input Gauge Size
Minimum Impedance Unbridged
1.5 ohms
Minimum Impedance Bridged
3 ohms
THD at Rated RMS Power
Speaker Level Inputs
Preamp Outputs
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 500 Hz
Low-Pass Crossover Frequency
50 - 500 Hz
Subsonic Filter
Switchable Off/30 Hz
Signal-to-Noise Ratio
108 dB
Bass/Gain Remote
Optional (Accessory required and sold separately)
Fan Cooled
Fuse Rating
60A X 1 In-Line Fuse Recommended
CEA-2006 Compliant
Sonic Certified Amplifier
Not Tested
Amp Bluetooth Connectivity
Hi-Res Certified
Authorized Dealer
Authorized Dealer
Authorized Dealer
What is in the box?
WITB: Amplifiers
Mounting screws (4)
Adhesive brand badge
Allen wrenches (2)
User manual
Specials with this Item
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
JL Audio MHD900/5

JL Audio MHD900/5



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September 14, 2012

Great Amp, Small Footprint

This thing is a BEAST! It fit behind the seat of my Super Crew with ease and my system sounds amazing! I wish I had a little more juice for my subs (2 10" W1s) at times but I do not regret this purchase one bit. I love the look of my clean install with this amp and did I mention it sounds amazing?!?! Absolutely NO white noise, no hum, just raw power. Worth every penny.


found this helpful.


April 29, 2018

Best Amp I have ever owned!!!!

I have owned everything from Polk Audio, Alpine, Kicker and most recently a Pioneer amp all in different vehicles with different setups. I replaced the Pioneer amp with this JL. Install was a breeze as it comes with connectors for the all the wires. Hardest part was figuring out where to mount the amp in the boat. Great design. Great quality. Would recommend it to everyone. Yes it’s expensive but well worth it.


found this helpful.

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900W 5-Channel Class D, MHD Series Small Profile Marine Amplifier with R.I.P.S. Technology


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