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JL Audio MX500/4

Compact marine/powersports 4-channel amplifier — 70 watts RMS x 4

Item # 13698408

Few things are more pleasurable than playing loud music while you're out tearing it up off road or on the water.

Few things are more pleasurable than playing loud music while you're out tearing it up off road or on the water.

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Item # 13698408

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About the JL Audio MX500/4

Power your music on water or land

Few things are more pleasurable than playing loud music while you're out tearing it up off road or on the water. JL Audio's MX500/4 compact 4-channel amplifier can send 70 watts RMS to each of your speakers so you'll enjoy your music's clarity and power over all the noise of you having fun. Or, for some real power sports, you could use this amp in bridged 2-channel mode to drive a couple of high-performance speakers or subwoofers with 250 watts RMS each.
JL Audio Built In USA

Power your music on water or land

Few things are more pleasurable than playing loud music while you're out tearing it up off road or on the water. JL Audio's MX500/4 compact 4-channel amplifier can send 70 watts RMS to each of your speakers so you'll enjoy your music's clarity and power over all the noise of you having fun. Or, for some real power sports, you could use this amp in bridged 2-channel mode to drive a couple of high-performance speakers or subwoofers with 250 watts RMS each.

Weatherproof

The MX500/4 comes equipped to overcome the dangers of weather, dirt, and corrosion, thanks to a tough aluminum chassis and gasketed control and connection covers. And you won't have to worry about getting caught in the rain — this amp carries a full IPX6 rating against water intrusion, so it'll play on through a storm. (You can spray it, but you can't dunk it.)

Compact technology

JL Audio's NexD™ Class D amp technology delivers full-range power efficiently and with low distortion. You'll get remarkable sound quality from an amp that fits into the kind of tight spots often found in marine applications. It's also ideal for your motorcycle, ATV, golf cart, tractor, or any other vehicle using a 12-volt charging system.

JL Audio MX500/4

Controls for the MX500/4 are on the underside protected by a sealed cover.

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Product highlights:

  • 4-channel amplifier
  • 70 watts RMS x 4 at 4 ohms (125 watts RMS x 4 at 2 ohms)
  • 250 watts RMS x 2 bridged at 4 ohms (4-ohm stable bridged)
  • variable low- and high-pass filters (35-300 Hz, 12 dB/octave)
  • Class D amplifier design with NextD™ switching amp technology
  • IPX6 water-resistance rating
  • corrosion-resistant cast aluminum chassis
Other Features:
  • preamp and speaker-level inputs (speaker wire to RCA adapter required for speaker-level input)
  • 4-gauge power and ground leads and a 50-amp fuse recommended — wiring and hardware not included with amplifier
  • no onboard fuses — when installing multiple amps in a system, an additional 50-amp in-line fuse between the distribution block and the amplifier is recommended
  • 9-3/8"W x 1-13/16"H x 4-9/16"D
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 98408

What's in the box:

  • 4-Channel marine amplifier with 12" power/signal pigtails
  • 4 Self-tapping screws (1" length)

Customer reviews

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JL Audio MX500/4 reviews

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JL Audio MX500/4

Crutchfield customer from Akron, OH on 6/5/2019

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Nice little unit. Easy to install and sounds great.

Pros:

Cons:

Crutchfield response on

0 of 0 found this helpful

GREAT

Mauro from Haltom City, TX on 5/30/2019

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It is a powerful small amp, more than enough power to run my 4 JL Audio Vex pods. Very clear and have not had any issues with it. I've been running it for over 6 months now.

Pros: small, compact, simple, powerful

Cons: Adjustments are on the bottom, so you can't access them after being mounted (not a big deal really).

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0 of 0 found this helpful

Upgrade/Better Choice

Acie from Dallas, TX on 2/26/2019

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Overheats a lot and then shuts down.

Pros: Size.

Cons: Easily Overheats and shuts down/turn off often.

Crutchfield response on 2/27/2019
Acie contacted our Customer Support team and set up a return. Purchases from Crutchfield can be returned or exchanged within 60 days.

1 of 1 found this helpful

JL Audio MX500/4

Phil from Jefferson, GA on 12/23/2018

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This thing runs for awahile and then gets heated up and starts cutting in out. Have it mounted to where there is air moving all ount it, even on the bottom and it's mounted to a aluminum frame.

Pros: Well maybe there isn't any. Because it's size may be part of the problem.

Cons: Clipping, sound and then no sound and continues doing this after warming up.

Crutchfield response on 12/26/2018
Phil, we're sorry you're having issues with your amp. Whenever you encounter a problem with anything you purchase from Crutchfield, please contact our Tech Support team. They can help you solve the problem or set up a return within 60 days of purchase. Lifetime tech support comes with every Crutchfield purchase.

1 of 1 found this helpful

Wow

seth from St Clairsvle, OH on 9/18/2018

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Powerful and clear. Works great on my street glide

Pros:

Cons:

Crutchfield response on

4 of 4 found this helpful

JL Audio MX500/4

Crutchfield customer from Albany, GA on 6/18/2018

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Easy install, worked better than expected

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Plenty of clean power in a small package

Bryan from Cumming, GA on 1/27/2018

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I installed this amp in my Jeep Wrangler. It's small enough I could hide it away easily. With it being waterproof I don't have to worry about it getting rained on or dunked when doing a water crossing. Setting up the gain for the different efficiency of my front and rear speakers was easy. The separate crossover points for the front and rear channels also came in handy. It produces plenty of power to drive a pair of 5 1/4" 4 ohm component and a pair of 6 1/2" 3 ohm component speakers, backed up by a Wet Sounds Stealth 8 for bass. It runs cool even when used at the higher volumes needed to overcome the road, tire, and wind noise in my topless Jeep.

Pros: Small, waterproof, runs cool, and low load on the battery.

Cons:

Crutchfield response on

3 of 3 found this helpful

Overheats

Verified buyer from Baytown, TX on 5/19/2017

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After 40 min of use the amp overheated and shut off. Amp gets pretty hot. Was well ventilated out in the open. Currently trying to get technical support over product.

Pros: Simple to connect. Good size

Cons: Overheats

Crutchfield response on 5/22/2017
We're sorry you're having issues with your amp. If the problem continues, please just reach back out to our tech support team. They can help you solve the problem or set up a return within 60 days of purchase. Lifetime tech support comes with every Crutchfield purchase.

3 of 4 found this helpful

Cuts Out in Cold Temperatures

Jose from Baytown, TX on 4/13/2017

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I had this amplifier Installed in my Jee Wrangler and kept cutting in and out in cold weather temperatures. Replaced with in kind and continued to have the same problem. Spoke with Technical Support and verified all settings and wiring also and couldn't find solution. Switched to a different amplifier and has been functioning as rated with no issues.

Pros: Marine Proof Small

Cons: Cuts in and out in cold weather temps.

Crutchfield response on

2 of 3 found this helpful

Compact amp with more power!

Crutchfield customer from Wisconsin on 9/25/2016

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In a small compact car, it can be hard to find space to properly install an amp. Which, when the Alpine KTP-445u (and the like) came out, it was great! it delivered more power than the head unit and could be easily hidden behind the dash. Unlike the Alpine, this JL delivers much more power. Granted, it is also larger and will require you to provide proper power and grounding -- the power and ground are 8ga - 6ga. When paired to a set of JL C5s, it was night and day difference!

Pros: Still compact 70Wx4 @ 4ohms

Cons: You will have to run proper power and ground Harness molded to unit

Crutchfield response on

7 of 8 found this helpful

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Product Research

Features
Controls
Connections

Features

4-Channel Amplifier: The JL Audio MX500/4 compact full range, 4-channel Class D marine amplifier is designed for the harsh marine environment. Its IPX6 water-resistance rating also makes it ideal for motorcycles, ATVs, or other utility vehicles. It can be used to drive four full-range speakers, or a couple of subwoofers.

NexD Switching Technology: The MX500/4 employs an advanced, high-speed Class D switching design called NexD that allows the amp to produce serious power without overtaxing the battery and charging system.

Amplifier Ratings:

  • Rated Continuous (RMS) Power @ 14.4 V (<1% THD+N):
    • 70 watts RMS x 4 @ 4 Ω
    • 90 watts RMS x 4 @ 3 Ω
    • 125 watts RMS x 4 @ 2 Ω
    • 250 watts RMS x 2 @ 4 Ω bridged
  • Rated Continuous (RMS) Power @ 12.5V (<1% THD+N):
    • 55 watts RMS x 4 @ 4 Ω
    • 70 watts RMS x 4 @ 3 Ω
    • 90 watts RMS x 2 @ 2 Ω
    • 180 watts RMS x 2 @ 4 Ω bridged

Input Section: The MX500/4's input section accepts a wide range of input voltage levels. It can accept a line-level signal from 250 mV to 4 Volts, or speaker-level signals from 750 mV to 15 Volts. The amp is equipped with Input Voltage switches for the front (1&2) and rear (3&4) channels that allows you to choose Low or High level input signals.

Protection Circuitry: The MX500/4's protection circuitry automatically shuts the amplifier down if thermal limits are exceeded, a short-circuit is detected in the speaker wiring, or if current levels are too high. The green Power LED and red Protect LED will indicate conditions by its on/off or flashing status.

Controls

Control Panel: The amplifier's control panel is located on the bottom of the amplifier. The removable cover is held in place by 4 Phillips-head screws, and features a rubber gasket that seals out moisture and dust. You will need a small flat screwdriver to set the five switches and four rotary dials. The Control Panel is divided into Front and Rear sections with the same controls in each section, plus a Channel Mode switch. The following controls are located in the Control Panel:

  • Channel Mode: The 3-way Channel Mode switch lets you select 2-channel, 3-channel, or 4-channel operation:
    • 2-channel: In 2-channel mode you can run 2 bridged mono outputs or 4 stereo outputs without fading capability. In this mode, you can use the front inputs only.
    • 3-channel: 3-channel mode lets you 2 stereo front and 2 mono rear outputs, or 2 stereo front and a bridged mono output. Front inputs only are used in this mode.
    • 4-channel: If you select 4-channel mode, you can run 4 stereo outputs with fading capability. Both front and rear inputs are used in this mode. You can also run 2 bridged stereo outputs with the left input signal connected to both front inputs and the right input to both rear inputs.
  • Independent Controls: The amplifier offers separate controls for the front channels and rear channels:
    • Input Voltage: You can select the type of input signal being used: High Level (speaker) or Low Level (line).
    • Input Sensitivity: The Input Sensitivity Control is a rotary dial that lets you match your source unit's output voltage to the input stage of the amplifier for maximum clean output.
    • Filter Mode Switch: The amp is equipped with switchable crossovers for each set of channels. You can set the filter to High-Pass (HP), Low-Pass (LP), or Off.
    • Filter Frequency: When the Filter Mode Switch is turned to HP or LP, you can set the cutoff frequency on the rotary dial. The filter is continuously variable from 35Hz to 300Hz, with detents at 80Hz and 135 Hz. The HP/LP filter has a slope of 12dB/Octave.

Connections

Wiring: The MX500/4's wiring is internally connected and exits the amp through a waterproof opening. The following connections can be found, each with 12" pigtails:

  • Power: The power wire coming out of the amp is a single 8-gauge wire. JL Audio recommends a minimum of 4-gauge wiring for the power wiring. You will need to add a fuse to the power wire within 18" of the battery. A 50A fuse or circuit breaker is recommended.
  • Ground: An 8-gauge ground wire is connected to the amplifier. A minimum of 4-gauge wiring is recommended for the ground wire. You may need a ground distribution block to splice the ground wires together.
  • Remote Turn-On: A 16-gauge remote turn-on wire is connected to the amp. You should connect the turn-on lead to the remote turn-on output of your source unit. If the source unit does not have a dedicated remote turn-on output, the amp's turn-on lead can be connected to +12V via a switch that derives power from an ignition-switched circuit.     Note: The amp does not have an audio signal-sensing turn-on, so the remote turn-on lead must be connected.
  • Signal Inputs: Four female RCA jacks are provided for the input signal--Left/Right Front and Left/Right Rear channels. If the source unit does not offer preamp level outputs, you can splice the speaker output wires to a pair of RCA plugs, or use the JL Audio XD-CLRAIC2-SW RCA-to-Speaker Wire Adapter. The amp's RCA connectors have waterproof caps.
  • Speaker Outputs: Eight 16-gauge speaker wires are provided on the amplifier for connecting to the wiring to your speakers.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Replace the MHX 280/4 [ Chad  Mar 21, 2019 ]
A
matches speakers at correct wattage and ohms and is compact enough for my smaller car [ Robert James  May 28, 2018 ]
A
JL makes good quality audio accessories [ Merralee  May 03, 2018 ]
A
Used the MHX280 and gave great power, so I wanted to upgrade with the compact size. [ delano  May 05, 2017 ]
A
Jl makes the best products [ Shaun  Apr 26, 2017 ]
A
Will be using for my 2008 Jeep Wrangler since there is damp areas I might get into without my top. [ JOSE  Dec 03, 2016 ]
A
Marine grade for my jeep. [ Daniel  Oct 14, 2016 ]
A
250w by 2 ch into 4 ohm, marine rated, small frame size, exactly what I was looking for! [ Jerry  Aug 15, 2016 ]
SHOW MORESHOW LESS

1 question already asked

Q
Can you hook up a sub to this amp?
[ Chris  May 10, 2019 ]
1 answer
A
Yes! I have a JL sub and a JL tower speaker connected to it
[ RAFAEL  May 24, 2019 ]

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