Sony Mobile XM-S400D GS-Series Ultra-Compact 4-Channel Amplifier

$148.00 OR

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Model: XM-S400D UPC: 027242894570 Item: 170858

Product Information

XM-S400D GS-Series Ultra-Compact 4-Channel Amplifier

Power up your in-car sound with the XM-S400D stereo amplifier. Each of the amplifier's 4 channels deliver 100W of dynamic audio, while low and high pass filters separate the frequency range to ensure a more accurate sound stage. The speaker level input makes installation easy, even with integrated head units.


  • Class-D amplification technology for high power
  • 100 W x 4 maximum power output
  • Low and high pass filters for accurate sound
  • Speaker level inputs with power sensing for simple installation
  • Overload protection circuit and speaker level input



Size & Weight

  • Dimensions (W x H x D): 62.6 x 37.3 x 162.8
  • Weight: 1.01 lb


  • Channel Configuration: 4ch
  • High Pass Filter: 120 Hz
  • High-Pass Filter Slope: 12 dB/oct
  • Low Pass Filter: 120 Hz
  • Low-Pass Filter Slope: 12 dB/oct

Rated Output Power, RMS 20 - 20000 Hz

  • Max. Channel Configuration at 4 ohm (W) / THD (%): 45 W x 4/1.0%
  • Max. Channel Configuration at 2 ohm (W) / THD (%): 45 W x 4/1.0%

Maximum Output Power (1 kHz)

  • Max. Channel Power Configuration at 4 ohm: 100 W x 4

General Features

  • Frequency Response: 20-20 kHz
  • Tolerance: +0.5/-3 dB
  • Signal to Noise Ratio: 100 dB
  • Total Harmonic Distortion at 1 kHz (%): 0.08%


  • CEA Power output: 45 W x 4
  • CEA SN Ratio: 83 dBA
  • MOSFET: Yes/Yes
  • Line In: Input Sensitivity: 1 V/8 V
  • Current drain (A) - rated output power at 4 ohm: 15 A

What's in the Box

What's in the Box:

  • One XM-S400D amplifier
  • Signal input plug
  • Power/Speaker output plug
  • Mounting hardware
  • Owner's manual



We'd love to hear your thoughts! Please leave a review.

Customer Reviews for Sony Mobile XM-S400D GS-Series Ultra-Compact 4-Channel Amplifier

5.0 / 5.0
2 Reviews
5 Stars
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3 Stars
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1 Star
Rated 5 out of 5
Great Sound, Awesome Size, Perfect
I bought this and the Sony XAV-AX5000 Receiver and the two sound absolutely perfect together. Can't go wrong.
December 30, 2019
Originally posted at
Rated 5 out of 5
Awesome little amp, barely larger than a red brick
I bought this amp because I was not satisfied by the sound delivered by the radio unit made by another company. I did not want to pull extensive wiring, specially for the speakers. This amp was small enough to tuck away behind the glovebox and connects back to the car's original speaker wires, yet delivered punchy bass and more. To my surprise, the mids and trebles also improved in clarity and speed. I guess this is the last radio unit from "another company" that I will own.
April 16, 2019
Originally posted at


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