For Sale: JL AudioM 400/ 4 , 400 watt, class D 2/3/4 channel, marine amplifier. Brand new in original packaging. Description 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. 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 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 40 A (AFS, AGU or MaxiFuse™)