JL Audio M400/4

Marine, M Series 4-Channel Class D Full-Range Amplifier

  • 5.0

(2 reviews)

Read 2 reviews

Write a review

Specials with this product

  • Free Ground Shipping to the 48 statesdetails

Price Information

$469.95

–$90.00

$379.95

Add an Optional Extended Warranty

Add

$44.99

$

Out of Stock

save to wish list

Why Shop Sonic?

SONY Marine Gear Giveaway

Customer Testimonial

When my factory radio died, I needed installation parts to put a CD stereo into my older Mercury vehicle. Sonic Electronix had everything I needed, which they helped me find with very friendly service! The prices were great, too!

- Steve Mills from Santa Clarita, CA

See more…

  • M Series 4-Channel Class D Car Amplifier
  • RMS Power Rating (14.4V):
    • 4 ohms: 75 watts x 4 chan.
    • 2 ohms: 100 watts x 4 chan.
    • Bridged, 8 ohms: 150 watts x 2 chan.
    • Bridged, 4 ohms: 200 watts x 2 chan.
  • RMS Power Rating (12.5V):
    • 4 ohms: 60 watts x 4 chan.
    • 2 ohms: 90 watts x 4 chan.
    • Bridged, 8 ohms: 120 watts x 2 chan.
    • Bridged, 4 ohms: 180 watts x 2 chan.
  • NexD technology features unsurpassed efficiency
  • Pulse Width Modulated MOSFET power supply
  • Remote bass level input (JL Audio HD-RLC remote level control sold separately)
  • LED power (green) and protect (red) indicators
  • Soft Start Turn-on
  • 4/3/2 channel operation
  • Total amplifier efficiencies exceed 80%
  • Advanced Thermal Rollback System completely eliminates annoying thermal shut-down events
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-Way System Protection circuitry (thermal, overload, and speaker short protection)
  • Studio-grade signal processing with fully variable crossover filters
  • Differential input circuitry effectively combats alternator whine and other noises created by boat systems
  • Heavy duty aluminum alloy heatsink for extreme heat dissipation
  • Silver-plated RCA level inputs
  • Silver-plated screw terminals
  • Input sensitivity:
    • Level: 100mV-4V
  • Variable high-pass filter (50-500 Hz, 12 dB/octave Butterworth)
  • Variable low-pass filter (50-500 Hz, 12 dB/octave Butterworth)
  • Damping factor: >150 @ 4 ohms per chan./50 Hz
  • Frequency response: 12-22,000 Hz
  • Dimensions: 8-1/2"L x 7-1/8"W x 2-1/16"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 1-year Sonic Electronix warranty

Product History:

JL Audio M400/4 thumbnail
(newest, current model)
JL Audio M4500 thumbnail
(previous model, replaced by JL Audio M400/4)
Power Specifications - Full Range Channels
RMS Power @ 4 ohms 75 watts x 4 channels
RMS Power @ 2 ohms 100 watts x 4 channels
RMS Power @ 1 ohm Not Stable
Bridged RMS Power 200 watts x 2 channels
Peak Power Output Not Specified
Amplifier Specifications
Marine Certified Yes
Amplifier Class D
Number of Channels 4
Total RMS Power Output 400 watts
Maximum Input Gauge Size 4 AWG
Minimum Impedance Unbridged 2 ohms
Minimum Impedance Bridged 4 ohms
THD at Rated RMS Power 1.0%
Speaker Level Inputs No
Preamp Outputs 1 pair
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
Signal-to-Noise Ratio >104 dB
Bass/Gain Remote Optional (Accessory required and sold separately)
Fan Cooled No
Fuse Rating 40A x 1 
CEA-2006 Compliant No
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 1 year
Labor Warranty Duration 1 year
Warranty Provider Sonic Electronix
Customer Review Summary for JL Audio M400/4
Average Customer Rating is 5.0 out of 5 stars:
  • 5.0
based on 2 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
.
100%
4 star:
.
0%
3 star:
.
0%
2 star:
.
0%
1 star:
.
0%
what's this?
Average Attributes Rating:
Durability
  • 5.0
5.0
Value
  • 4.5
4.5
Features
  • 5.0
5.0
Design
  • 5.0
5.0
Usability
  • 5.0
5.0
what's this?
Most Helpful Customer Reviews:
March 28, 2013 Great Amp
Review by
Club Car from Santa Fe, Tx
Overall
  • 5.0
Durability
  • 5.0
Value
  • 4.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
I use this to power 2 JL Audio 7.7's and a 10" sub on my golf cart. Works great. It is mounted in the engine compartment, open to the elements and I've had no problems.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious
August 13, 2012 Sounds great
Review by
Mike from Woodland, CA
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
Extremely easy hook up and sounds great. small enough to fit perfectly behind back seat in my 06 Silverado extended cab
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious
Amplifier Wiring Kits
Get the wires you need to properly install and power your marine amplifier.
  Product Price Add?
Kicker PKD4 Kicker PKD4
Dual Amplifier 4 Gauge Amp Installation Kit w/ Distribution Blocks
$199.95
NVX XKIT42 NVX XKIT42
Complete 4 Gauge Amp Wiring Kit with RCA Interconnect Cables and Speaker Wire!
$94.99
The InstallBay AK4 by Metra The InstallBay AK4 by Metra
4 Gauge Amplifier Installation Kit with RCA Interconnect Cable
$29.99
StreetWires ZN1K-04 StreetWires ZN1K-04
4 Gauge (AWG) ZN1 Series Single Amplifier Installation Kit for Systems up to 1000 Watts
$39.99
RCA Interconnects
You will need a good set of RCA interconnect cables to connect your amplifier to your head unit. Using high quality cables ensure the best sound possible by reducing unwanted noise interference, providing tight contacts, and utilizing the latest in cable technology.
  Product Price Add?
Kicker 4-Channel RCA Audio Interconnect Cable Kicker 4-Channel RCA Audio Interconnect Cable
4 Meters (13 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted-Pair, Hyper-Flex Technology
$34.95
StreetWires ZN9 Series Interconnect Cable StreetWires ZN9 Series Interconnect Cable
16.4 ft. of 4-Channel RCA Cable with Rhodium-plated contacts and ZeroNoise construction for clear signal transfer!
$99.99
Speaker Wire
Improve the sound quality by delivering more power when replacing your factory wiring. High quality speaker will maximize your amplifier investment and system performance.
  Product Price Add?
Kicker XW1220 Speaker Wire Kicker XW1220 Speaker Wire
12 Gauge Wire - 20 ft. of Dual Twist Speaker Cable with Sleeves for a Clean Install
$39.95
StreetWires SCP1215BL - 12 AWG Speaker Wire StreetWires SCP1215BL - 12 AWG Speaker Wire
12 Gauge Wire - 15 ft. of Speaker Cable with Twisted Construction
$24.99
Installation, Tools & Accessories
With our professional install card, you can have your amp installed by a pro near you, or you can purchase tools and do the install yourself.
  Product Price Add?
StreetWires FB4 StreetWires FB4
4 AWG / 4 Gauge Firewall Bushing
$7.99
Kicker DB1448 (09DB1448) - Top of the Line! Kicker DB1448 (09DB1448) - Top of the Line!
Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs
$29.95
Car/Marine Audio Installation Kit Car/Marine Audio Installation Kit
Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.
$14.99
Main Product
  Product Price Add?
JL Audio M400/4 JL Audio M400/4 $379.95

Product Summary

Manufacturer: JL Audio
Model number: M400/4
UPC: 699440982719
Weight: 5.50 lbs
Internal SKU: m4004
Internal product ID: 26965