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JL Audio MHX280/4

280W 4-channel Class D Full-Range Marine Amplifier

JL Audio
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• 50W x 4 @ 4ohms , 70W x 4 @ 2ohms
• NexD™ ultra-high-speed switching design
• Black powder-coated finish
• Gasketed cover for the controls
• Stainless steel hardware for durability
• Accepts RCA (low-level) & Speaker-level (high-level) signal
• Signal to Noise Ration: 89.5 dB

Learn more about the mhx2804

We apologize

This item has been discontinued

Product Highlights


• 50W x 4 @ 4ohms , 70W x 4 @ 2ohms
• NexD™ ultra-high-speed switching design
• Black powder-coated finish
• Gasketed cover for the controls
• Stainless steel hardware for durability
• Accepts RCA (low-level) & Speaker-level (high-level) signal
• Signal to Noise Ration: 89.5 dB

Description


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Authorized dealer

JL Audio MHX280/4

MHX280/4 - 4-channel Class D Full-Range Amplifier

Engineered specifically for limited-space marine applications, the 4-channel MHX280/4 amplifier employs JL Audio's 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.

MHX280/4 Side View

Key Features:

Small Footprint, Big Kick

The JL Audio HXM280/4 is clearly designed to be as small as possible without sacrificing the quality and performance we all expect from a JL Audio product. At 1.77" x 3.09" x 8.66" the JL Audio HXM280/4 is one of the smallest amplifiers on the market. When compared to its small footprint, the engineering is extraordinary considering the amp is equipped with a proper bank of settings - including a 12 dB per octave filter slope - and true full range frequency response (20 Hz - 20,000 Hz) . Putting the 'nerdy' figures aside, and you still have an amplifier that put outs solid modest power for any sized setup - 50W x 4 @ 4Ω , 70W x 4 @ 2Ω , & 140W x 2 @ @ 4Ω (Bridged)

NexD Switching Technology

JL Audio have taken the simple fixed PWM approach - found in almost all common amplifiers - and enhanced it with a very high switching frequency: 400 kHz, which is exponentially higher than most Class D Full-range amplifiers. This pushes the amplifier's bandwidth to a much higher frequency than seen before, and still provide minimal distortion and improved efficiency, while keeping typically bulky circuity more compact. Your speakers will reward you with crisp, clear performance. The bottom line is simply great audio: clean, powerful and reliable.




Sonic Electronix Power Certified Amplifier

The JL Audio MHX280/4 4-Channel Amplifier is a Sonic Electronix Certified Amplifier. This amp's power output has been professionally tested with our SMD Amplifier Dyno, bringing you it's true power ratings.
Learn more about this amp's Sonic Electronix Certified Power Here!


Impedance
Claimed Output
Certified Results
Dynamic Results
4 Ω
50W @ 14.40V
70W @ 14.21V
68W @ 14.20V
3 Ω
64W @ 14.40V
97W @ 14.14V
69W @ 14.17V
2 Ω
70W @ 14.40V
122W @ 14.14V
121W @ 14.16V
4 Ω (Br)
140W @ 14.40V
185W @ 13.95V
208W @ 14.09V



General Features:

  • Monoblock Class D Full Range Amplifier
  • RMS Power Rating @ 14.4 V:
    • 4 ohms: 50 watts x 4 chan.
    • 2 ohms: 70 watts x 4 chan.
    • Bridged 4 ohms: 140 watts x 2 chan.
  • RMS Power Rating @ 12.5 V:
    • 4 ohms: 36 watts x 4 chan.
    • 2 ohms: 52 watts x 4 chan.
    • Bridged 4 ohms: 100 watts x 2 chan.
  • Sonic Electronix Certified Power Rating* @ 14.4 V:
    • 4 ohms: 70 watts x 4 chan.
    • 2 ohms: 122 watts x 4 chan.
    • Bridged 4 ohms: 185 watts x 2 chan.
  • NexD™ ultra-high-speed switching design
  • Black powder-coated finish
  • Gasketed cover for the controls
  • Stainless steel hardware for durability
  • LED power (green) and protect (red) indicators
  • Accepts RCA (low-level) & Speaker-level (high-level) signal
  • Switchable Input sensitivity: 250 mV-4 V (Low) to 750 mV-15 V (High)
  • Channel Input Mode Switch: 2 / 3 / 4
  • Switchable filter modes: Low-Pass / High-Pass
  • Variable filter: 35 - 300 Hz, 12 dB/octave
  • Frequency Response: 20 - 20,000 Hz
  • Total Harmonic Distortion (THD): <1.0%
  • Signal to Noise Ration: 89.5 dB
  • Damping Factor: >60
  • Fuse Rating: 35A x 1
  • Dimensions: 8.66"W x 3.09"D x 1.77"H
  • 8 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty


Check out the JL Audio MHX280/4 Owner's Manual

*The Sonic Electronix Certified Power Ratings listed are based on a test of a specific sample amplifier. Actual power ratings may slightly vary between amps.

This item is currently not eligible for our low price guarantee. This may be due to supply constraints, manufacturer restrictions, or another reason. We're always here to help you get the best price possible so give us a call or email today. Our experts will do their best to build the system that works for you within the rules.

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
50 watts x 4 channel
RMS Power @ 2 ohms
70 watts x 4 channel
Bridged RMS Power
140 watts x 2 channel
Amplifier Specifications
Amplifier Class
D
Number of Channels
4-Channel
Total RMS Power Output
280 watts
Maximum Input Gauge Size
8 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
<1.0%
Speaker Level Inputs
Yes
Preamp Outputs
No
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
35 - 300 Hz
Low-Pass Crossover Frequency
35 - 300 Hz
Signal-to-Noise Ratio
89.5 dB
Remote bass/level controller
No
Fuse Rating
35A x 1 
Sonic Certified Amplifier
Yes
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

MHX280/4

Weight:

3.00lbs

Internal SKU:

mhx2804

Internal Product ID:

93438

Product and How-to Videos


  • JL Audio MHX280/4 Marine Amplifier Dyno Test | SMD D'Amore AD-1
  • JL Audio HX300/1 & MHX300/1 Car and Marine Amplifiers | Product Overview

Customer Ratings & Reviews



5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

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Awesome harley amp

I have had the arc audio and cerwin vega amps. This little thing is as good if not better than the arc and blows the cerwin vega out of the water. Installed on an electra glide with focal seprates in the fairing and lowers. Louder cleaner sound then I have ever had. It's a rolling concert everywhere I go. Friend had an amp dyno and with the bike running it put out 94 watts x4 at 4 ohms. Sound better and louder than the 136 watts the arc was putting out. Don't get me wrong the arc is great but loving this jl.

By Baskel on March 22, 2016

2

found this helpful.

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