JL Audio M400/4 4-Channel Class D Marine Amplifier + JL Audio M6-770X-S-GMTI-I 7.7" Marine Speakers w/ LEDs
Amp Highlights
4-Channel Class D Marine Full-Range Amplifier, 100 W x 4 @ 2 Ω / 75 W x 4 @ 4 Ω - 14.4V
This tiny amplifier packs a serious full-range punch, delivering a staggering 100 watts to each of its four channels into 2 Ω (14.4V, 1% THD). The breakthrough that makes this much power possible in such a small chassis is our NexD™ ultra-high-speed switching design, which allows for full bandwidth Class D operation with extremely low distortion and outstanding efficiency.
Use the M400/4 in combination with our M600/1 monoblock to build a 1000 W amplification system to power four satellites and a subwoofer... and fit the whole thing under a seat. Or, use the M400/4 by itself to power two satellites, plus a subwoofer. With M-Series amplifier, the possibilities are endless.
The M400/4 includes a 12 dB / octave filter for each channel bank, which can be configured as a low-pass or high-pass filter and offers continuously variable cutoff frequency selection from 50-500 Hz. With the addition of an HD-RLC remote level control (sold separately), the amplifier's Ch. 1 & 2 level or overall level can be directly controlled from a remote location.
This marine amplifier features white and gray powder-coat finishes, a gasket cover for the controls and stainless steel hardware for durability in the marine environment.
Amp Features
Rated Continuous (RMS) Power @ 14.4 V
@ 4 Ω |
75 W RMS x 4 |
@ 2 Ω |
100 W RMS x 4 |
Bridged @ 4Ω |
200 W RMS x 2 |
Rated Continuous (RMS) Power @ 12.5 V
@ 4 Ω |
60 W RMS x 4 |
@ 2 Ω |
90 W RMS x 4 |
Bridged @ 4Ω |
180 W RMS x 2 |
Amp Specifications
Frequency Response |
12 Hz - 22 kHz (+0, -1dB) |
S/N Ratio, referred to highest rated power |
104 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
S/N Ratio, referred to 1 W |
84 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
Damping Factor @ 4 Ω |
150 / 50 Hz |
Damping Factor @ 2 Ω |
75 / 50 Hz |
THD+N @ Rated Power |
1% @ 2 Ω per Ch. |
Input Voltage Range @ RCA Inputs |
100 mV - 4 V RMS |
Min.Copper Power / Ground Wire Gauge |
4 AWG wire |
Fuse Rating |
40 A (AFS, AGU or MaxiFuse™) |
Amp Signal Processing
Filter Mode(s) |
Low-Pass or High-Pass |
Filter Slope(s) |
12 dB/octave |
Filter Frequency Range |
50 Hz - 500 Hz |
Detent, Calibrated Filter Freq. Potentiometers |
Yes |
Filter Defeat Function |
Yes |
Remote Level Control |
Optional (HD-RLC) |
Remote Level Modes |
2 or All channels |
Channel Input Mode Switch |
Yes (2/4 ch.) |
Pass-Through Preamp Output |
Buffered |
Source Channel Selection for PreOuts |
Yes |
Amp Physical Specifications
Height (H) |
2.05 in / 52 mm |
Width (W) |
8.52 in / 216 mm |
Depth (D) |
7.09 in / 180 mm |
Net Weight |
4.75 lb / 2.15 kg |
Speaker Highlights
M6 7.7-inch Marine Coaxial Speakers with Transflective™ LED Lighting for Infinite-Baffle Use (100 W, 4 Ω) - Gunmetal Trim Ring, Titanium Sport Grille
Purpose-engineered and built for real marine duty, M6 coaxial systems deliver maximum audio performance in any open-air boating environment, with the added visual impact of JL Audio’s Transflective™ RGB LED lighting..
The oversized 7.7-inch design of the M6-770X coaxial results in increased efficiency (more output for a given amount of power). Combine that advantage with long excursion and excellent power handling and you have a speaker system truly capable of playing loud and clear in a powerboat at speed. The woofer element is optimized to operate with a large volume of air behind it (at least 2 cu. ft. / 57 l). Operating this coaxial system in less space will compromise its low frequency performance.
A 1-inch pure silk dome tweeter, specially treated to withstand the marine environment, handles the high-frequency duties. You will appreciate the clean, articulate high-frequency response of the M6 dome tweeter, especially at higher volume levels.
A multi-order, true 2-way passive crossover is concealed within the woofer chassis, shielded from vibration and corrosion. Also included, is an automatic, solid-state tweeter protection circuit to minimize the possibility of tweeter failure.
Although M6-770X Coaxial Systems can be used with as little as 40 W per channel, for best audio performance we recommend amplifiers capable of between 40-200 W of continuous power per channel. The patent-pending Transflective™ RGB LED technology emits a smooth lighting effect through the woofer cone, with a choice of several lighting colors. Add an optional RGB controller to create thousands of color variations.
Production of all M6 loudspeakers takes place in JL Audio’s Miramar, Florida factory, using global components and materials.
Sold as a pair.
General Specifications
Continuous Power Handling (RMS) |
100 W |
Recommended Amplifier Power (RMS) |
40 - 200 W / Ch. |
System Efficiency |
91.0 dB @ 1 W / 1 m |
System Nominal Impedance |
4 Ω |
System Frequency Response |
45 Hz - 25 KHz ± 3 dB |
Coaxial Physical Specifications
Frame Outer Diameter (A) |
7.70 in / 196 mm |
Bolt Hole Circle Diameter (B) |
6.92 in / 176 mm |
Frontal Grille Protrusion* (C) |
1.08 in. / 27 mm |
Mounting Hole Diameter (D) |
6.25 in / 159 mm |
Mounting Depth (E) |
3.32 in. / 84 mm |
*Frontal grille protrusion measured from mounting surface |