The flagship of JL Audio’s marine line is their M-series of speakers, subwoofers and amplifiers. Made to tolerate the harshest marine environments, and give crystal clear, powerful sound without missing a beat.
The M400/4 is a tiny amplifier which 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 JL Audio’s 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 the JL Audio M600/1 monoblock amplifier to build a 1000 W amplification system to power four satellites and a subwoofer, and fit the whole thing under a seat. Alternatively, the M400/4 will drive power to two satellites, plus a subwoofer, making it the perfect powerhouse for small, single audio zone setups – Small skiboats with limited space will benefit from the tiny footprint with amazing sound quality. With an 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.
Specifications
At 14.4 Volts (Typical whilst under engine alternator charge)
| @ 4 Ω | 75 W RMS x 4 |
| @ 2 Ω | 100 W RMS x 4 |
| Bridged @ 4Ω | 200 W RMS x 2 |
At 12.5 Volts (Typical whilst at anchor or running off house battery – no charge)
| @ 4 Ω | 60 W RMS x 4 |
| @ 2 Ω | 90 W RMS x 4 |
| Bridged @ 4Ω | 180 W RMS x 2 |
| 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™) |
| 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 |
MADE IN FLORIDA, USA
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