Your cart
Contact us
Close contact box
Connect ID #
996 534 831 4
Connect ID #
996 534 831 4
All finished with your chat session?

We’ll email you a transcript of this conversation for your records.

Our contact center is currently closed.

Please enter your name.  
Please enter a valid email address. Why is this required?

For Tech Support, call 1-888-292-2575

Thank you, !
Our conversation will be emailed to
Chat Advisor Image

Your Advisor,

More about me
Please enter a question  
Don't wait on hold. We'll call you back when it's your turn to talk with the next available .
Please enter your name  
Please enter your phone number  

Please enter a message  

Calls may be recorded for training and quality control purposes.

We are located in Virginia USA.

JL Audio M600/6

6-channel marine amplifier — 75 watts RMS x 6

Item # 136M6006

JL Audio's M600/6 marine amp is small — less than 11" wide — but it delivers a massive amount of...

JL Audio's M600/6 marine amp is small — less than 11" wide — but it delivers a massive amount of...

California customers:
Please click here for your Proposition 65 warning.

Item # 136M6006

In stock

Free custom vehicle instructions

Installation help for your car, from our experts.

60-day returns

If you don't love it, send it back.

60-day price protection

We’ll reimburse you if the price drops.

About the JL Audio M600/6

Small footprint, big kick

JL Audio's M600/6 marine amp is small — less than 11" wide — but it delivers a massive amount of power from its compact chassis — up to 100 watts from each of its six channels. It owes these impressive specs to JL Audio's Class D NexD™ ultra-high-speed switching design, which eliminates the traditional drawbacks of a Class D amp design to deliver full-bandwidth performance, excellent efficiency, and very low distortion levels.
JL Audio Built In USA

Small footprint, big kick

JL Audio's M600/6 marine amp is small — less than 11" wide — but it delivers a massive amount of power from its compact chassis — up to 100 watts from each of its six channels. It owes these impressive specs to JL Audio's Class D NexD™ ultra-high-speed switching design, which eliminates the traditional drawbacks of a Class D amp design to deliver full-bandwidth performance, excellent efficiency, and very low distortion levels.

Great for a variety of applications

You can use this 6-channel amp for a variety of applications. Run three sets of high-performance coaxial or component speakers, or bridge the amp to 2-channel mode to get three subs thumping. Or enjoy the best of both worlds by powering a combination of full-range speakers and subs.

You can run the built-in variable frequency filters in high- or low-pass mode, depending on whether you're powering speakers or subs. JL Audio's optional wired remote lets you adjust the amp's level from the helm. The special powder-coat finishes, the gasketed control cover, and the stainless-steel hardware all protect this amp against the harsh realities of the marine environment.


Product highlights:

  • 6-channel marine amplifier
  • 75 watts RMS x 6 at 4 ohms (100 watts RMS x 6 at 2 ohms)
  • 200 watts RMS x 3 in bridged mode (4-ohm stable in bridged mode)
  • Class-D design
  • white and gray powder-coat finishes, gasketed control cover, and stainless steel hardware
  • variable high- and low-pass filters (50-500 Hz, 12 dB per octave)
  • optional remote level control
  • 4-gauge power/ground leads and 50-amp fuse recommended — wiring and hardware not included with amplifier
  • 10-1/4"W x 2-1/16"H x 7-1/8"D
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 98272

What's in the box:

  • 6-Channel Class-D marine amplifier
  • Allen wrench
  • JL Audio emblem
  • Owner's Manual

Customer reviews

Loading reviews...

JL Audio M600/6 reviews

Average review:

38 reviews

Thanks for submitting your review

Filter by rating

Customer photos

Sort reviews

Sort by:
Items per page:
View page:

Verified customer (What's this?)
Verified employee review (What's this?)



Crutchfield response

<< >>

Product Research



6-Channel Full-Range Amplifier: The JL Audio M600/6 is a six-channel, Class-D marine amplifier utilizing NexD ultra-high speed switching technology to deliver outstanding fidelity and efficiency. The M600/6 can be operated with a wide variety of source units and system configuration.

Marine Amplifier: The JL Audio M-series marine amplifiers are specifically designed for marine applications. These amps are not waterproof, however, and should not be mounted where they are likely to get wet.

Amplifier Rating: The JL Audio M600/6 Class D marine amplifier is rated at 75 Watts RMS x 6-channels in 4-ohm at 20 to 20,000Hz with a signal-to-noise-ratio of 104 dB and a total harmonic distortion of 1% while receiving 14.4 Volts.

NexD Class D Technology: NexD is a state-of-the-art switching amplifier design that combines exceptional audio quality with excellent efficiency and less complexity. This results in an affordable compact amplification with exceptional audio quality and unsurpassed total efficiency.

Advanced Rollback Protection: The M-Series amplifiers employ advanced thermal and low-impedance protection to virtually eliminate annoying amplifier shut-down events. Should any M-Series amplifier ever overheat, its intelligent, unregulated power supply reacts by limiting available peak voltage until the amplifier returns to a safe temperature range. Likewise, if an impedance lower than optimal for the amplifier is present at the outputs, the M-series amplifier will roll back peak voltage to protect itself without shutting 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 12-volt audio installation.

Note: You will need three speaker wire-to-RCA adapters (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 top 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 self-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 Amber (Yellow): The Amber (Yellow) LED light indicates that an over-current condition has occurred and is accompanied by a muting of the amplifier's output. Over-current condition can be caused by a speaker impedance lower than the optimum load impedance range for the amplifier or a short-circuit in the speaker wiring.
  • LED Off: The only condition that will shut down an undamaged M600/6 completely is if battery voltage or remote turn-on voltage drops below 10 Volts. The amplifier will turn back on when voltage climbs back above 11 Volts.

Cooling System: The outer shell of the JL Audio amplifier is designed to remove heat from the amplifier circuitry. For optimum cooling performance, this outer shell should be exposed to as large a volume of air as possible. Enclosing the amplifier in a small, poorly ventilated chamber can lead to excessive heat build-up and degraded performance.


Control Panel Cover: The M600/6 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 two 2.5mm hex-head screws.

Simplified Gain Setting: The M-series amplifier makes setting the gain level of the amp 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).

Note: The M600/6 is equipped with a independent gain controls for channels 1&2, 3&4, and 5&6.

Flexible Input Section And Active Crossover Network: The JL Audio M-series 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 M-series amplifier crossover sections allow you to seamlessly switch slopes, easily change filter frequencies and address what frequencies the preamp inputs will pass. The M600/6 offers the following independent crossover adjustments for the front, rear, and subwoofer channels along the unit's top panel, behind a removal cover plate.

  • Input Mode: This switch allows operation of all six 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).
  • Filter Mode: The amplifier allows you to select either a Low Pass, High Pass or Full-Range operation of the amplifier's 1&2 channels, 3&4, and 5&6 channels.
  • Variable Frequency: You can set the amplifier's Low Pass or High Pass crossover from 50 to 200 Hz for channels 1&2, channels 3&4, and channels 5&6.


Power/Ground/Turn-On Terminals: The amplifier features set-screw terminals for the power, ground, and remote turn-on connections.

  • Power and Ground: The Power and Ground terminals are designed to accept 4-gauge power wire; a 2.5mm Allen wrench is supplied for making connections.
  • Remote Turn-On: The remote turn-on terminal will accept 18-gauge to 8-gauge wire; the same 2.5mm Allen wrench is used for making connection.
Note: The Amplifier is not equipped with a fuse. An external 50-amp fuse (not included) must be installed on the power wire. If a wiring kit is used which includes a fuse with a value greater than 50-amps, the original should be replaced with a 50-amp fuse.

Speaker Output Terminals: The M600/6 amplifier's twelve set-screw speaker terminals will accept 16-gauge to 8-gauge speaker wire. A 2.5mm Allen wrench is supplied for making connections.

Preamp Inputs: The amplifier features 3 sets of differential-balanced RCA jack inputs. The amplifier features a dedicated Input Sensitivity gain control for the front 1&2, 3&4, and 5&6 channels of the amplifier. These controls are designed to match the input sensitivity of the M600/6 to the specific signal source that is feeding it. The amplifier's input level can be set independently for the front and rear channels between 100mV-4V.

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 2, 4, or 6 channels of the M600/6 from 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 M-series 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.

Loading accessories...

Customer Q&A

7 questions already asked

Will this M600/6 run 6 polk MM651 3ohm speakers. I currently am running an Alpine PDX f6 4 channel not sure on the rca inputs of reciever to 6 rca on amp?
[ BRANDON  Jun 22, 2022 ]
1 answer
This amp should do nicely to power those speakers. It can definitely handle 3-ohm (technically 2.7-ohm) speakers, and it has plenty of power for the job. This amp has the ability to accept 2-, 4-, or 6-channels of input from a receiver, so even if you only have four channels coming from the receiver, that'll work just fine!
[ Nemo  Jun 22, 2022 ]  Staff
I have an M4560 in my 07 mastercraft. is this M600/6 directly comparable with that other jl amp?
[ Priscilla  May 16, 2022 ]
1 answer
Yes perfect swap. But don't use it for the 10" sun and cockpit speakers. My 06 x star had it hooked up to 6 cockpit speakers and the single 10". Under powering all speakers. Use the 600 for your 6 cockpit speakers if that how many you have. And run a mono amp for your sub.
[ Chris  May 16, 2022 ]
will this amp run 4 M3 6.5's and 2 M6 7.7's sufficiently? or will i be underpowering the M6 7.7's?
[ chris  Apr 15, 2020 ]
3 answers
Yeah it should run it no problem..
[ CHRIS  Apr 21, 2020 ]
I'm running 6 M6 7.7 and its awesome. I do not have a subwoofer
[ KIRK  Apr 21, 2020 ]
I dont see why not. I'm powering 4 6.5's and a 12 inch subwoofer. Its loud and clear!!!
[ Gregg  Apr 21, 2020 ]
can this amp power 4 JL Audio M3-770X-S-GW on one channel and 2 JL Audio M3-770X-S-GW on the other two channels? sub will have its own amp (8 total speakers)
[ Pat  Sep 11, 2019 ]
2 answers
If I understand, you will have one JL AUdio M3-770X-S-GW on each of the first 4 channels of this amp and then two of those same speakers on each of the two remaining amp channels making a total of 8 speakers. If that is correct, then that can work!
[ Paul  Oct 09, 2019 ]  Staff
I dont believe your requested configuration will be adequately handled by the 600 amp. You're better served to go to the 800. I wanted to put 6 speakers and a sub on my boat and it was recommended that I use a 800. Since i already had the amp, i just used 4 speakers. If i do decide to add speakers i will add a small amp for that.
[ Gregg  Oct 08, 2019 ]
Can this run 6 speakers and a sub-woofer?
[ Gregg  Jun 28, 2018 ]
3 answers
could run 4 speakers and a sub.
[ Jason  Jul 08, 2018 ]
It should be fine with that set up. Just make sure it doesn't exceed the rated wattage. Also, crutchfield phone support is top notch. They really do know their stuff!
[ Jeremy  Jun 29, 2018 ]
Nope. I bought it to power 4 marine speakers and 1 marine sub. It's a good amp in my opinion. My boat can be heard from pretty far away.
[ Paul  Jun 28, 2018 ]
How long does the sale last?
[ Charles  Apr 26, 2015 ]
1 answer
The current sale lasts through 4/30.
[ Jeff  Apr 28, 2015 ]  Staff

Loading articles...

Compare the sound