JL Audio M400/4: 4 Ch. Class D Full-Range Marine Amplifier, 400 W

4-Channel Class D Marine Full-Range Amplifier, 100 W x 4 @ 2 � / 75 W x 4 @ 4 � - 14.4V

This tiny amplifier packs a serious full-range punch, delivering a staggering 100 watts to each of its four channels into 2 � (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.

Rated Continuous (RMS) Power @ 14.4 V

@ 4 � 75 W RMS x 4

@ 2 � 100 W RMS x 4

Bridged @ 4� 200 W RMS x 2

Rated Continuous (RMS) Power @ 12.5 V

@ 4 � 60 W RMS x 4

@ 2 � 90 W RMS x 4

Bridged @ 4� 180 W RMS x 2

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 � >150 / 50 Hz

Damping Factor @ 2 � >75 / 50 Hz

THD+N @ Rated Power <1% @ 2 � 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��)

Signal Processing

Filter Mode(s) Low-Pass or High-Pass

Filter Slope(s) 12 dB/octave

Filter Frequency Range 50 Hz - 500 Hz

Detented, 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

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