Sony XMS400D Compact 4-Channel Amplifier

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SonySKU: XM-S400D

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Seriously small amp

Sony knows that many vehicles just don't have space for a big amplifier, so they've created the XMS400D 4-channel amp. This tiny powerhouse will blow your mind — blasting your front and rear speakers with 45 watts RMS each from a chassis that's the size of a big candy bar.

High- and low-pass filters

You can't bridge this amp, but you can use the onboard switchable high- and low-pass filters to run small subs with the rear channels and full-range speakers with the front channels. The amp will accept preamp or speaker-level signals, so it'll hook up to just about any system.

Looking for bass

Got a Sony receiver with Mega Bass but no subs yet? This amp connects easily to your system, and the extra power will make your speakers sing. If you've got aftermarket speakers in your car, turn on Mega Bass and you'll hear a night-and-day difference in the bass.


Product highlights:

  • 4-channel car amplifier
  • 45 watts RMS x 4 at 4 ohms (non-bridgeable, only works with 4- to 8-ohm speakers)
  • CEA-2006 compliant
  • switchable high-pass filter on front channels (120 Hz at 12 dB/octave)
  • switchable low-pass filter on rear channels (120 Hz at 12 dB/octave)
  • preamp and speaker-level inputs
  • fuse: 15A x 1
  • 12-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • dimensions: 7-1/4"W x 1-1/2"H x 2-1/2"D
  • warranty: 1 year
  • MFR # XMS400D

What's in the box:

  • 4-Channel amplifier (15A ATM fuse installed)
  • 8" RCA input harness (10-pin Molex plug)
  • 39" Speaker-level input harness (10-pin Molex plug)
  • 40" Power/speaker output harness
  • 2 Self-tapping screws (3/4" length)
  • 2 Mounting tabs
  • 2 Bracket screws (1/8" diam.x 1/4" length)
  • Operating Instructions
  • European Guarantee Information Document

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