JL AUDIO M400/4 400 W 4-Channel Class-D Full-Range Marine Amplifier | 98271

JL AUDIO 98271, M400/4: 4 Ch. Class D Full-Range Marine Amplifier, 400 W

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This tiny amplifier packs a serious full range punch, delivering a staggering 100 W to each of its four channels into 2 Ohm (14.4 V, 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 Mp-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 Channel 1 and 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.

Additional information

Weight 15 lbs
Item Name

Full-Range Marine Amplifier







400 W

Number of Channels


Load Impedance

2 and 4 Ohm

Signal to Noise Ratio

>104 dB Below Rated Power (A-Weighted, 20 Hz to 20 kHz Noise Bandwidth)

Total Harmonic Distortion

<1% at 2 Ohm/Channel

Voltage Rating

100 mV to 4 V RMS

Frequency Response

12 Hz to 22 kHz (+0, -1 dB)

Fuse Rating

40 A

Amplifier Class

Class D


4 AWG Wire


White and Gray Powder Coated

Damping Factor

>75/50 Hz at 2 Ohm, >150/50 Hz at 4 Ohm


4.75 lb