M-Series 5-Channel Class-D Marine Grade Amplifier 75W x 4ch + 300-Watt Mono @ 2-Ohm
The M700/5 is ideal for a complete audiophile-grade, subwoofer + four satellite system, and it fits comfortably in just about any boat's weather-tight compartments. With this incredible little amplifier, you can drive two pairs of quality component speaker systems with plenty of clean power (75W x 4 @ 4Ω), while also delivering a stout 300W of power to a subwoofer system. The breakthrough that makes this much power possible in such a small chassis is our NexD™ switching design.
The M700/5 includes a 12dB / octave high-pass filter for one main channel pair, a 12dB octave high-pass or bandpass filter for the other main channel pair, plus a variable slope low-pass filter for its subwoofer channel. All three filters offer continuously variable cutoff frequency selection from 50-500 Hz. This amplifier's filters can also be configured as a true 3-way crossover, with a low-pass filter for the subwoofer channel, a bandpass filter on Ch. 3 & 4, and a high-pass filter on Ch. 1 & 2. An "x10" multiplier switch on the Ch. 1 & 2 high-pass filter allows its cutoff frequency to be adjusted from 50-500Hz or 500-5000Hz. With the addition of an HD-RLC remote level control (sold separately), the amplifier's subwoofer channel 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
Main Channels @ 4 Ω |
75 W RMS x 4 |
Main Channels @ 2 Ω |
100 W RMS x 4 |
Main Channels - Bridged @ 4Ω |
200 W RMS x 2 |
Subwoofer Channel @ 4 Ω |
180 W RMS x 1 |
Subwoofer Channel @ 3 Ω |
240 W RMS x 1 |
Subwoofer Channel @ 2 Ω |
300 W RMS x 1 |
Subwoofer Channel @ 1.5 Ω |
N/A |
Frequency Response (Main Channels) |
12 Hz - 22 kHz (+0, -1dB) |
Frequency Response (Subwoofer Channel) |
10 Hz - 1 kHz (+0, -1dB) |
S/N Ratio, referred to highest rated power (Main Channels) |
>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 (Main Channels) |
<1% @ 2 Ω per Ch. |
THD+N @ Rated Power (Subwoofer Channels) |
<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 |
60 A (AFS, AGU or MaxiFuse™) |
Filter Mode(s): Channels 1 & 2 (front) |
High-Pass only |
Filter Slope(s): Channels 1 & 2 (front) |
12 dB/octave |
Filter Frequency Range: Channels 1 & 2 (front) |
50 Hz - 5 kHz |
Filter Mode(s): Channels 3 & 4 (rear) |
High-Pass or Bandpass |
Filter Slope(s): Channels 3 & 4 (rear) |
12 dB/octave |
Filter Frequency Range: Channels 3 & 4 |
50 Hz - 500 Hz |
Filter Mode(s): Subwoofer Channel |
Low-Pass only |
Filter Slope(s): Subwoofer Channel |
12/24 dB/octave |
Filter Frequency Range: Subwoofer Channel |
50 Hz - 500 Hz |
Detented, Calibrated Filter Freq. Potentiometers |
Yes |
Filter Defeat Function |
Yes |
Infrasonic Filter: Subwoofer Channel |
none |
Remote Level Control |
Optional (HD-RLC) |
Remote Level Modes |
Sub Ch. or All Channels |
Channel Input Mode Switch |
Yes (2/4/6 ch.) |
Pass-Through Preamp Output |
None |
Source Channel Selection for PreOuts |
N/A |
Physical Specifications

Height (H) |
2.05 in / 52 mm |
Width (W) |
10.23 in / 260 mm |
Depth (D) |
7.09 in / 180 mm |
Net Weight |
6.15 lb / 2.79 kg |