Power up your in-car sound with the XM-S400D stereo amplifier. Each of the amplifier's 4 channels deliver 100 W 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.
Power up your in-car sound with the XM-S400D stereo amplifier. Each of the amplifier's 4 channels deliver 100 W 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.
in 3 offers
The lowest price for Sony XM S400 D Class D Stereo Amplifier right now is $156.07 at eBay.com.au, compared across 3 retailers.
The all-time low was $151.97 on 11 May 2026 — today's price is 3% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 14 June 2026.
Sony XM S400 D Class D Stereo Amplifier
Power up your in-car sound with the XM-S400D stereo amplifier. Each of the amplifier's 4 channels deliver 100 W 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.
Power up your in-car sound with the XM-S400D stereo amplifier. Each of the amplifier's 4 channels deliver 100 W 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.
Last updated at 14/06/2026 00:27:57
Sony XMS400D 4 Channel Micro Amplifier (Black)
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Sony XMS400D 400W 4 Channel Micro Amplifier
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Sony XMS400D Class D Stereo Amplifier
Delivery $10
originally posted on walmart.com
Love the Size and Performance
originally posted on ebay.com
Has a little engine noise going through it and is even grounded really good
originally posted on ebay.com
Needs to have adjustable power knob blow-up in less then a month from over heating..
Sony XMS400D 4 Channel Micro Amplifier (Black)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Sony XMS400D 400W 4 Channel Micro Amplifier
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Sony XMS400D Class D Stereo Amplifier
Delivery $10
Love the Size and Performance
Has a little engine noise going through it and is even grounded really good
Needs to have adjustable power knob blow-up in less then a month from over heating..
I have this amp in my 2015 ford fusion powering 4 infinity audio 6 . 5 speakers (1 in each door) .The volume is definitely louder but the quality is just okay . You can’t really turn it up and listen to any bass / mids at the same time . It’s great if you just want louder music but not for any bass
Great product for it price. Sound clear. Very compact.
I recently upgraded my speakers in my Prius. Not wanting to swap the head unit this fit the bill. It was easy to install with the high input and splicing with the factory head unit. It sounds great and is inconspicuous.
I really didn't think this amplifier was going to work so good, I just changed my stereo to an aftermarket car play and the sound became so low that I couldn't even listen when I was driving, then I installed this amplifier and sound got higher and clear. Now I have to get the volume down
My desktop setup is : Pioneer mvh-x580bs, this amp and a 30amp power supply . It's a home audio setup using car audio equipment .I made bookshelves using 6 . 5 Silver Flute and NVX xsptw tweeters . The Pioneer deck has active crossovers (2 way plus sub) .It all sounds absolutely amazing! The bookshelves are . 46 cubic feet each with a port . I do have an 8 powered sub to fill in the lows .This little amp is so clean . Only gets very warm, but not too hot to touch . I don't worry about it as it has thermal protection included . There is no Gain control . I don't care, the amp sounds great .I plan on putting a video demonstration on youtube soon .Cons : Crossover is not useful at 120hz . It's not bridgeable either .
When they said micro they weren't kidding, it was very easy to wire up, easy to set up, and sounds great
If you already have a head unit installed, don't waste your time and money, you won't get the best sound!
