JL Audio MX280/4 Class D 4 Channel Full Range Speaker Amp Amplifier 280w RMS
JL Audio

JL Audio MX280/4 Class D 4 Channel Full Range Speaker Amp Amplifier 280w RMS


4 Ch. Class D Full-Range Amplifier, 280 W



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Product Information


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.


  • 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™)
  • @ 4 Ω    50 W RMS x 4
  • @ 2 Ω    70 W RMS x 4
  • Bridged @ 4Ω    140 W RMS x 2

What's Included

  • MX280/4

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