4 Ch.Class D Full-Range,400W

4 Ch.Class D Full-Range,400W

4 Ch.Class D Full-Range,400W

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4 Ch.Class D Full-Range,400W

MFG#: M400/4



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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 gasketed cover for the controls and stainless steel hardware for durability in the marine environment.

General 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

50 A (AFS, AGU or MaxiFuse™)


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


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