MRA31 – 3-channel marine amplifier

RRP $549

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MRA31 is a three channel amplifier with a nominal output of 2 x 65 Watts +1 x 170 Watts (1 x 280 Watts in 2 ohm). The perfect amplifier for a standard installation with a front system in stereo and a subwoofer

  • Built-in high-pass, low-pass and subsonic filters.
  • Variable phase control on sub channel.
  • Protection circuits shut down the amplifier in the event of overloads.
  • High level input with auto start. The PC-board is protected against damp with a protective layer of laquer. 
  • RMS output power @ 13,8 V, 20Hz – 20 kHz

MRA31 is discontinued, we recommend MRA41 as a good alternative.

Description / type Stereo amplifier for marine use
Number of channels 3
Amplifier class AB
Output power in 4 ohm 2 x 65 W RMS
Output power in 2 ohm 2 x 90 W RMS
Mono sub channel 4 ohm 170 W RMS
Mono sub channel 2 ohm 280 W RMS
Mono bridge mode 4 ohm 200 Watt RMS
Damping factor > 100
S/N ratio, A-weighted > 100 dB
Frequency range 10 Hz – 35 kHz
Input sensitivity 0,25 – 5 Volt
Input impedance >10 kohm
Input impedance, high level 100 ohm
Filters channel A & B HP: 50 – 150 Hz
Filter sub channel LP: 50 – 120 Hz + subsonic 25 Hz
Low level output Yes
High level input with auto start Yes
Remote phase shift control No
Phase control for subwoofers 0-180 degrees cont. variable
Power consumption (idle) 1 A
Power consumption (max) 60 A
Voltage 12 – 15 volt DC
Rec. power cable Minimum 4AWG / 21 mm2
Fuses 2 x 30 A
Dimension (W x D x H) 70 x 357 x 268 mm (2,92 x 14,06 x 10,55 inch)
Weight 4 kg / 8,8 lbs