MX280/4

 

4-Channel Class D Full-Range Amplifier, 70 W x 4 @ 2 Ω / 50 W x 4 @ 4 Ω - 14.4V

 

 

Engineered specifically for powersports applications, the 4-channel MX280/4 amplifier employs our high-speed NexD™ switching design to deliver plenty of clean power, without straining charging systems. Its tiny, cast aluminum chassis is highly resistant to corrosion, with an IPX6 water-resistance rating, making it perfect for motorcycles, ATV’s or other utility vehicles.

 

Generating a solid 50W x 4 into 4 ohms (14.4V, 1% THD), the MX280/4 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 amplifier features a black powder-coated finish, a gasketed cover for the controls and stainless steel hardware for durability.

• MX280_4_Manual.pdf

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

 

 

General Specifications
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	>68 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™)

 

 

Signal Processing
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

 

 

Physical Specifications
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