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JL Audio  MHD600/4

MHD Series 4-Channel 150W RMS x 4 at 2 Ohms, Class-D Full-Range Marine Amplifier

Item #21626

Condition:   Brand New

Product Highlights

  • MHD Series
  • 4-Channel
  • 150W RMS x 4 at 2 Ohms
  • Class-D Full-Range
  • Marine Amplifier

  Free 2-Years Warranty Included!
60 DAYS Returns Accepted.
FREE Lifetime Tech Support.
FREE Shipping.
60 DAYS Price change protection.

$1,399.99

Reg. Price $1,499.99  Save $100.00
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  Free 2-Years Warranty Included!
60 DAYS Returns Accepted.
FREE Lifetime Tech Support.
FREE Shipping.
60 DAYS Price change protection.

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JL Audio MHD600/4 MHD Series 4-Channel 150W RMS x 4 at 2 Ohms, Class-D Full-Range Marine Amplifier


We are a JL Audio authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What's Inside?
  • • MHD Series 4-Channel Class-D Full-Range Marine Amplifier
  • • MHD amplifier
  • • Power input plug
  • • Speaker connection plug(s)
  • • (4) mounting feet
  • • 2.5 mm Allen wrench
  • • 4 mm Allen wrench
  • • (4) machine screws
  • • JL Audio badge
  • Owner's Manual

 


Why Choose JL Audio MHD600/4 Marine Amplifier?


 

 

JL Audio MHD600/4 Marine Amplifier Top View
Versatile Performance and Marine-Ready Durability for Your Sound System

Experience unmatched versatility with this amplifier, designed to seamlessly pair with the MHD750/1 for powerful subwoofer systems or operate as a 3-channel setup, delivering 150W x 2 to satellites and 300W x 1 to a subwoofer. Built for marine conditions, its rugged white and gray powder-coated finish, gasketed control cover, and corrosion-resistant stainless steel hardware ensure long-lasting durability on the water.

Experience Pristine Sound with Revolutionary Single Cycle Control™ Technology

Unlock the true potential of your marine audio system with the MHD600/4 amplifier, featuring revolutionary Single Cycle Control™ technology. This innovative design corrects distortion 400,000 times per second, ensuring pristine sound quality while consuming 60% less current and fitting into a compact design that's just 1/4 the size of traditional Class A/B amplifiers—making it the perfect choice for high-performance audio on the water.

 

JL Audio MHD600/4 Marine Amplifier Connection Panel Rear View
JL Audio MHD600/4 Marine Amplifier with the Control Panel Cover Plate Removed
Unleash Consistent Power and Clarity with R.I.P.S. Technology

Transform your marine audio setup with the MHD600/4 amplifier, powered by R.I.P.S. (Regulated, Intelligent Power Supply) technology. This cutting-edge feature guarantees consistent power output and minimal distortion across varying battery voltages and load impedances, ensuring you enjoy crystal-clear sound and dynamic performance on every wave.


Frequently Asked Questions (FAQ)


  • • Why does my JL Audio MHD600/4 keep going into Protection Mode?
    Protection Mode is usually caused by a shorted speaker wire, incorrect speaker impedance, or poor power and ground connections. Inspect your wiring before powering the amplifier back on.
  • • Why does the amplifier get extremely hot after an hour of boating?
    High temperatures are often caused by poor ventilation or driving low-impedance loads. Make sure the amplifier has adequate airflow and is wired within its rated specifications.
  • • Can I bridge the MHD600/4 to power two subwoofers?
    Yes, but each bridged channel must see at least a 4-ohm load. Wiring below the minimum impedance can trigger protection mode.
  • • Why do I hear alternator whine through my speakers?
    This is usually caused by a grounding issue or poorly routed RCA cables. Verify all grounds and keep signal cables away from power wires.
  • • Why is there a constant hissing noise even when the volume is low?
    The amplifier gain may be set too high for your source unit. Reduce the gain and match it to the output voltage of your head unit or DSP.
  • • Can I connect the MHD600/4 directly to a factory radio?
    Yes. The amplifier accepts high-level speaker inputs, making it compatible with many factory audio systems without a separate line output converter.
  • • Why does the amplifier shut off when I play music loudly?
    This is commonly caused by voltage drop, undersized power wiring, or an overloaded electrical system. Check your battery, charging system, and power cable size.
  • • Is the JL Audio MHD600/4 completely waterproof?
    No. It is marine-rated for moisture and salt exposure but should never be submerged or directly pressure washed.
  • • Why do only two channels have sound after installation?
    This is often caused by incorrect input switch settings or missing RCA input connections. Verify the input routing and channel configuration.
  • • Can the MHD600/4 safely run 2-ohm speakers?
    Yes. The amplifier is stable at 2 ohms per channel in stereo mode, provided each channel stays within JL Audio's recommended load limits.

SPECIFICATIONS


  • Low Frequency Response : 50-500 Hz
  • High Frequency Response : 50-500 Hz
  • Number of Channels : 4
  • Frequency Response : 6-30000 Hz
  • Built In Crossovers : Yes
  • RMS Power Output : 150x4 Watts
  • Channel Separation : Yes
  • Amplifier Class : D
  • Fuse Rating : 50 A
  • Promo : Yes

FEATURES


Features:

  • Amplifier Type: 4-channel Class D marine full-range amplifier
  • Power Output: 150 W x 4 at 1.5-4 Ω or 300 W x 2
  • Design Technology: Single-Cycle Control switching design for efficient performance
  • Power Regulation: R.I.P.S. (Regulated Intelligent Power Supply) technology for consistent power output
  • Sound Quality: Tight power supply regulation minimizes distortion and maximizes sound quality
  • Subwoofer Compatibility: Ideal pairing with MHD750/1 for subwoofer systems
  • 3-Channel Option: Can be used as a 3-channel system amplifier (150W x 2 for satellites, 300W x 1 for subwoofer)
  • Marine-Grade Construction: Durable build with white and gray powder-coat finishes
  • Control Protection: Gasketed cover for control protection
  • Corrosion Resistance: Stainless steel hardware for resistance in marine environments

 

Specifications:

  • RMS Power Output (Watts x Channels): 150 x 4
  • Frequency Response at Rated RMS Power: ---
  • THD at Rated RMS Power: 0.03%
  • Signal to Noise Ratio: 110 dB
  • Input Voltage: 14.4v
  • Peak Power Output (Watts x Channels): N/A
  • Power at 2 Ohms (Watts x Channels): 150 x 4
  • Bridged Power (Watts x Channels): 300 x 2
  • Minimum Impedance Bridged: 3 Ω
  • Minimum Impedance Unbridged: 1.5 Ω
  • Amplifier Class: D
  • Low-Pass Crossover Frequency: 50-500 Hz
  • Low-Pass Slope (dB/octave): 12 or 24 dB/octave
  • High-Pass Crossover Frequency: 50-500 Hz
  • High-Pass Slope (dB/octave): 12 or 24 dB/octave
  • Bass Boost: No
  • Bass Boost Frequency: N/A
  • Fan Cooled: No
  • Fuse Rating: 50A
  • Speaker Level Inputs: Yes
  • Preamp Outputs: 2
  • Height: 2 inches
  • Width: 10-3/4 inches
  • Depth: 9-1/2 inches
  • UPC: 699440982245
  • Weight: 8
  • 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!
  • a little monstrer. Had this amp for a couple of months just to see how it would hold up. It's still going strong.

    Heo
    11/11/2019

  • If you are looking to take your boat’s sound game to the next level, this MHD amplifier from JL Audio is the best for that. Really premium sound that’s going to push your speakers to their best. Enough power for pairing two sets of speakers.

    Mervin
    4/25/2024