JL Audio XD400/4V2 400W 4-Channel Digital Amplifier

Model: 98602 UPC: 699440986021 Item: 168948

Product Information


This tiny amplifier packs a serious full-range punch, delivering a staggering 100 watts to each of its four channels into 2 ohms (14.4V, 1% THD). The breakthrough that makes this much power possible in such a small chassis is JL Audio's NexD ultra-high-speed switching design, which allows for full bandwidth Class D operation with extremely low distortion and outstanding efficiency.

Use the XD400/4v2 in combination with JL Audio's XD600/1 monoblock to build a 1000W amplification system to power four satellites and a subwoofer... and fit the whole thing under a seat. Or, use the XD400/4v2 by itself to power two satellites, plus a subwoofer. With XD's, the possibilities are endless.

The XD400/4v2 includes a 12dB / octave filter for each channel bank, which can be configured as a low-pass or high-pass filter and offers continuously variable cutoff frequency selection from 50 - 500Hz.

The XD400/4v2 also features the v2 Spec feature set, which consists of automatic turn-on capability (via signal sensing or DC-offset sensing), and a dual-range differential-balanced input section able to handle a wide range of input voltage levels. With the addition of an HD-RLC remote level control (sold separately), the amplifier's level can be directly controlled from the driver's seat.

This amplifier features a black powder-coat finish and a gasketed, brushed aluminum cover for the controls.



  • Rated continuous (RMS) power @ 14.4 V
    • @ 4Ω: 75W RMS x 4
    • @ 2Ω: 100W RMS x 4
    • Bridged @ 4Ω: 200W RMS x 2
  • Rated Continuous (RMS) Power @ 12.5 V
    • @ 4Ω: 60W RMS x 4
    • @ 2Ω: 90W RMS x 4
    • Bridged @ 4Ω: 180W RMS x 2
  • Frequency response: 12Hz - 22kHz (+0, -1dB)
  • S/N ratio, referred to highest rated power: >104dB below rated power (A-weighted, 20Hz - 20kHz noise bandwidth)
  • S/N ratio, referred to 1W: >84 dB (A-weighted, 20Hz - 20kHz noise bandwidth)
  • Damping factor @ 4Ω: >150 / 50Hz
  • Damping factor @ 2Ω: >75 / 50Hz
  • THD+N @ rated power: <1% @ 2Ω per ch.
  • Input voltage range @ RCA inputs: Switchable from 200mV - 2V RMS (Low) to 800mV - 8V RMS (High)
  • Copper power / Ground wire gauge: 4 AWG wire
  • Fuse rating: 40A (AFS, AGU or MaxiFuse)
  • Filter mode(s): Low-pass or high-pass
  • Filter slope(s): 12dB/octave
  • Filter frequency range: 50Hz - 500Hz
  • Detented, calibrated filter freq. potentiometers: Yes
  • Filter defeat function: Yes
  • Remote level control: Optional (HD-RLC)
  • Remote level modes: 2 or All channels
  • Channel input mode switch: Yes (2/4 ch.)
  • Passthrough preamp output: Buffered
  • Source channel selection for PreOuts: Yes
  • Dimensions (H x W x D): 2.05" x 8.52" x 7.09"
  • Net weight: 4.75 lbs.

What's in the Box

What's in the Box:

  • One XD400/4v2 amplifier
  • 2.5 mm Allen wrench
  • JL Audio badge
  • Owner's manual



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