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Sony XM-GS100

Mono subwoofer amplifier — 600 watts RMS x 1 at 2 ohms (New Stock)

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Item #: 158XMGS100

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3 Reviews | 2 questions - 3 answers

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Brings you the bass

Sony XM-GS100 330W x 1 Subwoofer Amplifier

You'll get up to 600 watts RMS of bass power with Sony's XM-GS100 mono amplifier driving your sub. For maximum reliability, this compact amp sports a hefty heatsink that shunts off the heat that's generated when the amp's working hard. The XM-GS100 will also protect your subwoofer, with a Dynamic Distortion Suppressor circuit that rounds off the corners of dangerous square waves, minimizing the destructive effects of an overdriven signal.

More features

All connections are located on one side of the amp, which makes wiring simpler and neater. The tuning controls sit protected under a cover so they won't get inadvertently moved. You'll find a low-pass filter for keeping high notes away, along with a subsonic filter that helps tune your bass for a ported enclosure so the lowest notes don't get out of control. You can crank up the variable bass boost if you need some more bump. Sony protects this amp with a 3-year warranty, and that says a lot.

Sony's XM-GS100 mono amplifier

Product Highlights:

  • mono subwoofer amplifier
  • 330 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms)
  • CEA-2006 compliant
  • Dynamic Distortion Suppressor and Active Thermal Control
  • variable low-pass filter (50-300 Hz, 12 dB/octave)
  • variable subsonic filter (6-70 Hz, 12 dB/octave)
  • variable bass boost (0-10 dB at 40Hz)
  • Class-D amplifier design
  • frequency response: 10-300 Hz
  • preamp and speaker-level inputs
  • preamp outputs
  • fuse rating: 30A x 2
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 10-3/4"W x 2-1/8"H x 8"D
  • warranty: 3 years
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Sony XM-GS100 Reviews

Average Customer Review:

3 Reviews

Great little amp.

Written by: Laz from Illinois on December 19, 2015

I needed a small amp to drive a pair of Fosgate P2D2 8" subs in a ported box. They are each wired in series to 4 ohms then paralleled to 2 ohms total. I started with an Alpine MRP-M500 (known to be a good amp) then bought the Sony XM-GS400 for my doors. I liked the GS400 so much that I gave the GM100 a try because it matched. I'm impressed. This little Sony does a great job. Better then the Alpine. Looks good. Sounds good. I don't like that Sony used the older style terminals though. They loose 1/2 a star for that and another 1/2 a star for the price. It's a little bit overpriced for a 600w amp but the sound quality may justify that for some.

I mentioned the XM-GS400 4ch version. I HIGHLY recommend that amp for your door speakers. It's dead silent at idle (no hiss), crystal clear sound with a great soundstage and dynamics, and does every bit of it's rated power. The GS400 teamed with a GS100 are a perfect match but I'm not a real bass head. I wanted just a little more power to my other speakers (8" in the doors, 6x9" in rears) so I bought another GM400 and run them bridged.

Pros: Small. Clean power. Elegant styling. Easy to use.

Cons: Price. Uses old style terminals.

Sony XM-GS100

Written by: Nick from Chicago, Ill on June 26, 2013

I agree with Crutchfield. 5 Star amp. 600x2 RMS @ 1 ohm on a 2k watt 1 ohm 10" sub vibrates the seats quite nicely, hums almost in tune with the engine ;-)

Pros: Easy Installation, Hits Hard, Very nice vibrations. Will push a 2k watt 1 ohm rated sub efficient.

Cons: None that I have found thus far. Well they could have put 40 amp fuses in it instead of 35 lol.. just joking. ;)


Written by: DrumDawg from West Monroe, LA on December 7, 2012

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

I have this amp connected to a stock radio in a 2012 Miata mx5. Low profile so it mounts easily under the passenger seat. Running two(2) bass shakers- one in each seat. WOW!!! THIS ROCKS!!! At first I had it connected to the rear speakers through hi-level input (not enough voltage from rear outs) Then I called Crutchfield and they told me how to check the front speaker lines. Hooked it up! I'm telling you it's a space saver and this AMP IS AWESOME! I am quite impressed.

Pros: Crutchfield Service and a clean amp

Cons: need clearer descriptions of bass filters.

Hands-on research

What's in the box?

Download owner's manual

  • Mono amplifier
  • 4" Speaker level input harness
  • Two 30 amp ATO fuses (installed)
  • Four 1/2" Self-tapping screws
  • Operating instructions (English/ French/ Spanish)
  • Warranty information

Product Research


Crossover: The low pass crossover is always engaged (cannot be bypassed); the crossover point is continuously variable from 50 to 300 Hz.

Subsonic Filter: The subsonic filter's cutoff frequency is continuously variable from 6 to 70 Hz.

Bass Boost: For added low frequency output, the amplifier has bass boost circuits centered at 40 Hz, variable from 0 to +10 dB.

Protection Circuitry: The amp has three protection circuits:

  • Thermal: turns the amp off when the operating temperature is too high
  • Short circuit: turns the amp off when the speaker outputs are short-circuited
  • DC Offset: turns the amp off when it generates direct current

Power/Ground Terminals: The power and ground screw terminals are 0.55" wide.

Remote Terminal: The remote turn on screw terminal is 0.36" wide.

Speaker Outputs: There are two pair of speaker output screw terminals, internally shorted together so it's easy to connect two subwoofers. Each terminal is 0.36" wide.

Speaker-level Input Harness: A 4-pin speaker level input harness is included, allowing you to easily connect the amplifier to a factory radio or a receiver without preamp outputs.

Auto Turn-on: When using the speaker level inputs, the amp will automatically turn on when it senses an input signal.

Preamp Outputs: The amplifier features one set of RCA preamp outputs so you can send audio to another amplifier in your system. The preamp outputs are not affected by the built-in crossover.

Note: The preamp outputs are not active when the speaker level input is used.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Product reviews from the Crutchfield Labs

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Hefty little jewel

Written by Buck Pomerantz, Staff Writer - Creative, on 8/17/2012 5:05:00 PM

The first thing I noticed was the nice heft of the amp — it's pretty heavy for something with a footprint smaller than a piece of letter-size paper. Over half its chassis is heavy heatsink. All the connections are on one side, and they appear to be gold-plated. The adjustment controls are under a cover, which is removable with a Phillips-head screwdriver.

The instructions aren't in a bound owner's manual, but on a large fold-out sheet of paper. Make sure you read them carefully, they can be a little difficult to follow. However, the explanation of the Dynamic Distortion Suppressor feature clearly diagrams how it smooths the corners of square waves to lessen the distortion effects of over-driving the signal.

What are the Labs?

Customer Q&A

2 questions already asked

I have the remote wire hooked on.. Not sure if it cuts off or on without. [ GERONIMO  May 14, 2015 ]
It has a remote terminal, so that would need to be wired through, not sure about the second part though [ Sean  May 14, 2015 ]
Thanks for your question. For information on selecting the best amp for your subs I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system. [ Krissy  Mar 21, 2015 ]  Staff