JL Audio MX Marine and Powersports Amplifiers

4 Channel Full-Range Amplifier (280 watts) (MX280/4)

Part Number 010-03105-00

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Specs
In The Box
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PLAY ANYWHERE

With efficient NexD technology and a water-resistant chassis, MX amplifiers produce loads of clean power and are ideal for applications where moisture cannot be completely avoided.

DESIGNED FOR LIMITED SPACE APPLICATIONS

SHOCK-RESISTANT, WATER-RESISTANT AND BUILT TOUGH

EFFICIENT DESIGN FOR HIGH OUTPUT USES LESS ENERGY

COMPLETE SIGNAL PROCESSING SECTIONS ON BOARD

EXCEEDS INTERNATIONAL STANDARDS FOR SALT FOG AND UV EXPOSURE

3-YEAR WARRANTY

WHAT YOU'LL LOVE

POWER TO GO ANYWHERE

Housed in a tiny cast-aluminum chassis, MX amps are rugged, water-resistant (IPX7-rated) and ready to go where conventional amplifiers wouldn’t dare.

NexD ADVANTAGE

The highly efficient Class-D design reduces current draw and heat while generating loads of high-fidelity sound without straining small charging systems.

COMPLETE SIGNAL PROCESSING

For easy setup and system flexibility, a complete set of onboard filters and signal processing features is concealed behind every MX amplifier’s water-resistant control cover.

DIFFERENTIAL-BALANCED INPUTS

A versatile design accepts speaker level signals without a line-output converter — and delivers outstanding noise rejection while preventing alternator whine and other noises.

BUILT FOR THE ELEMENTS

The all-aluminum, powder-coated housing with marine-grade hardware inhibits corrosion, and a water-resistant security cover protects all controls from the harshest of seasons.

CHOOSE YOUR MODEL

FULL-RANGE STEREO

These amplifiers offer two 4-channel models with 280 and 500 watts.

SYSTEM AMPLIFIER

It’s a tiny 600-watt powerhouse with 2 full-range outputs plus a subwoofer output.

MONOBLOCK

Two models are available with 300 and 500 watts.

General
Channels	Monoblock/3/4
Physical dimensions (Height)	1.77" (45 mm)
Physical dimensions (Width)	Monoblock (300 W)/4-Channel (280 W): 8.66" (220 mm) Monoblock (500 W)/3/4-Channel (500 W): 9.33" (237 mm)
Physical dimensions (Depth)	Monoblock (300 W)/4-Channel (280 W): 3.09" (78.5 mm) Monoblock (500 W )/3/4-Channel (500 W): 4.50" (115 mm)
Weight	3.18 lbs (1.44 kg)
Operating voltage	11-15 VDC
Water and dust rating	IPX7
Warranty	3 years
Audio
Amplifier class	Class D
Rated continuous (RMS) power (14.4 V input @ 4 Ohm < 1% THD)	Monoblock (300 W): 160 W x 1 Monoblock (500 W): 300 W x 1 3-Channel: Main: 75 W x 2/Sub: 250 W x 1 4-Channel (280 W): 50 W x 4/140 W x 2 (Bridged) 4-Channel (500 W): 70 W x 4/250 W x 2 (Bridged)
Rated continuous (RMS) power (14.4 V input @ 2 Ohm < 1% THD)	Monoblock (300 W): 300 W x 1 Monoblock (500 W): 500 W x 1 3-Channel: Main: 100 W x 2/Sub: 400 W x 1 4-Channel (280 W): 70 W x 4 4-Channel (500 W): 125 W x 4
Rated continuous (RMS) power (12.5 V input @ 4 Ohm < 1% THD)	Monoblock (300 W): 160 W x 1 Monoblock (500 W): 250 W x 1 3-Channel: Main: 50 W x 2/Sub: 200 W x 1 4-Channel (280 W): 36 W x 4/100 W x 2 (Bridged) 4-Channel (500 W): 55 W x 4/180 W x 2 (Bridged)
Rated continuous (RMS) power (12.5 V input @ 2 Ohm < 1% THD)	Monoblock (300 W): 250 W x 1 Monoblock (500 W): 400 W x 1 3-Channel: Main: 80 W x 2/Sub: 300 W x 1 4-Channel (280 W): 52 W x 4 4-Channel (500 W): 90 W x 4
Signal-to-Noise Ratio, referred to highest rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs	Monoblock (300 W): > 85 dB Monoblock (500 W): > 97 dB 4-Channel (280 W): > 89.5 dB 4-Channel (500 W): > 88 dB
Signal-to-Noise Ratio, referred to highest rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs - Main Channels	3-Channel: > 88 dB
Signal-to-Noise Ratio, referred to highest rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs - Subwoofer Channel	3-Channel: > 88 dB
Signal-to-Noise Ratio, referred to 1 W (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs	Monoblock (300 W): > 64 dB Monoblock (500 W): > 70 dB 4-Channel (280 W): > 68 dB 4-Channel (500 W): > 70.5 dB
Signal-to-Noise Ratio, referred to 1 W (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs - Main Channels	3-Channel: > 68 dB
Signal-to-Noise Ratio, referred to 1 W (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs - Subwoofer Channel	3-Channel: > 68 dB
Damping factor @ 4 Ω	Monoblock (300 W): > 120/50 Hz Monoblock (500 W): > 115/50 Hz 4-Channel (280 W): > 60/50 Hz 4-Channel (500 W): > 92/50 Hz
Damping factor @ 2 Ω	Monoblock (300 W): > 75/50 Hz Monoblock (500 W): > 54/50 Hz 4-Channel (280 W): > 30/50 Hz 4-Channel (500 W): > 43/50 Hz
THD+N @ Rated Power	Monoblock (300 W/500 W)/4-Channel (280 W): <1% @ 2 Ω per Channel
THD+N @ Rated Power: Main Channels	<1% @ 2 Ω per Channel
THD+N @ Rated Power: Subwoofer Channel	<1% @ 2 Ω per Channel
Frequency response (+0, -1dB)	Monoblock (300 W)/3/4-Channel (280 W/500 W): 20 Hz-20 kHz Monoblock (500 W): 20 Hz-12 kHz
Input voltage range @ RCA inputs	Monoblock (500 W)/3-Channel: Switchable from 250 mV-4 V RMS (Low) to 580 mV-14 V RMS (High) Monoblock (300 W)/4-Channel (280 W/500 W): Switchable from 250 mV-4 V RMS (Low) to 750 mV-15 V RMS (High)
Fuse rating	Monoblock (300 W): 30 A Monoblock (500 W)/4-Channel (500 W): 50 A 3-Channel: 60 A 4-Channel (280 W): 35 A
Recommended fuse type(s)	AFS, AGU or MaxiFuse™
Min. copper power/Ground wire gauge	Monoblock (300 W)/4-Channel (280 W): 8 AWG wire Monoblock (500 W)/3/4-Channel (500 W): 4 AWG wire
Signal Processing
Filter mode(s): Channels 1 & 2	Monoblock (300 W/500 W): Off or Low-Pass only 3/4-Channel (280 W/500W): Off, Low-Pass or High-Pass
Filter Slope(s): Channels 1 & 2	Monoblock (300 W)/4-Channel (280 W/500 W): 12 dB/octave Monoblock (500 W): 24 dB/octave
Filter frequency range: Channels 1 & 2	Monoblock (300 W): 40 Hz-400 Hz 4-Channel (280 W/500 W): 35 Hz-300 Hz
Filter mode(s): Channels 3 & 4	4-Channel (280 W/500 W): Off, Low-Pass or High-Pass
Filter Slope(s): Channels 3 & 4	4-Channel (280 W/500 W): 12 dB/octave
Filter frequency range: Channels 3 & 4	4-Channel (280 W/500 W): 35 Hz-300 Hz
Filter mode(s): Subwoofer Channel	3-Channel: Off or Low-Pass only
Filter slope(s): Subwoofer Channel	3-Channel: 12 dB/octave
Filter frequency range: Subwoofer Channel	3-Channel: 40 Hz-400 Hz
Bass boost EQ (0 to +12 dB @ 45 Hz)	Monoblock (300 W/500 W): 0 to +12 dB @ 43 Hz
Detented, calibrated filter frequent potentiometers	yes
Remote level control	Monoblock (300 W/500 W)/3-Channel: Optional (RBC-1)
Channel input mode switch	3-Channel: yes (2/4 Channels) 4-Channel (280 W/500 W): yes (2/3/4 Channels)
Output polarity switch	Monoblock (300 W/500 W)/3-Channel: yes

MX amplifier with power/signal pigtails
Four 1-inch self-tapping screws

JL Audio MX Marine and Powersports Amplifiers