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4-Channel Class D Full-Range Marine Amplifier, 70 W x 4 @ 2 Ω / 50 W x 4 @ 4 Ω - 14.4V
Engineered specifically for limited-space marine applications, the 4-channel MHX280/4 amplifier employs our high-speed NexD™ switching design to deliver lots of clean power, while being kind to small charging systems. Its ultra-compact, cast aluminum chassis is highly resistant to corrosion, with an IPX6 water-resistance rating, making it ideal for applications where moisture would prohibit use of a conventional 12V amplifier.
Delivering a solid 50W x 4 into 4 ohms (14.4V, 1% THD), the MHX280/4 is fully bridgeable, so it can be used as a 3-channel amplifier, or as a 2-channel amplifier producing a potent 140W x 2 into 4 ohms.
Other features include independent front and rear crossovers with selectable full-range, high-pass or low-pass filter controls and a dual-range input section that accepts a wide range of input voltage levels, from line-level all the way to high-power speaker level signals.
This marine amplifier features a white powder-coated finish, a gasketed cover for the controls and stainless steel hardware for durability in the marine environment.
Rated Continuous (RMS) Power @ 14.4 V
@ 4 Ω 50 W RMS x 4
@ 2 Ω 70 W RMS x 4
Bridged @ 4Ω 140 W RMS x 2
Rated Continuous (RMS) Power @ 12.5 V
@ 4 Ω 36 W RMS x 4
@ 2 Ω 52 W RMS x 4
Bridged @ 4Ω 100 W RMS x 2
Frequency Response 20 Hz - 20 kHz (+0, -1dB)
S/N Ratio, referred to highest rated power >89.5 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
S/N Ratio, referred to 1 W >70.5 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
Damping Factor @ 4 Ω >60 / 50 Hz
Damping Factor @ 2 Ω >30 / 50 Hz
THD+N @ Rated Power <1% @ 2 Ω per Ch.
Input Voltage Range @ RCA Inputs Switchable from 250 mV - 4 V RMS (Low) to 750 mV - 15 V RMS (High)
Min.Copper Power / Ground Wire Gauge 8 AWG wire
Fuse Rating 35 A (AFS, AGU or MaxiFuse™)
Filter Mode(s) Low-Pass or High-Pass
Filter Slope(s) 12 dB/octave
Filter Frequency Range 35 Hz - 300 Hz
Detented, Calibrated Filter Freq. Potentiometers Yes
Filter Defeat Function Yes
Remote Level Control No
Remote Level Modes N/A
Channel Input Mode Switch Yes (2/3/4 ch.)
Pass-Through Preamp Output None
Source Channel Selection for PreOuts N/A
Height (H) 1.77 in / 45 mm
Width (W) 8.66 in / 220 mm
Depth (D) 3.09 in / 78.5 mm
Net Weight 3.18 lb / 1.44 kg
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