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Home Mobile Electronics Amplifiers S4-100 Multiple Channel Amplifier

S4-100 Multiple Channel Amplifier

(4 customer reviews)


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  • 4 Channel
  • 175 Watts (RMS) @ 2 Ohm
  • 2-Ohm stable
  • 4 AWG inputs

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SKU: S4-100 Categories: , Tags: ,


The S4-100 is a high-efficiency Class D multi-channel amplifier with a host of tone control options. 

The S4-100 balances deep and loud low ends with power for mids and highs. With the S4-100, you’ll have 175 Watts per channel in stereo on four channels at 2 Ohm and 100 Watts per channel in stereo on four channels at 4 Ohm.

For more power-hungry car stereos, it can be run in stereo at 375 Watts at 4 Ohm on two channels. This is perfect for driving one S4-100 to each door for car audio competitions and sound quality systems.

If increased volume and sound quality are what you want, look to SoundQubed mid-range speakers and tweeters for maximum sound quality and volume for your car audio system. 

Utilize the S4-100’s high pass crossovers to direct precisely tuned tones to your tweeters and midrange speakers. These filters prevent speaker damage and interference from low range bass tones. 

The multi-channel amp’s bandpass filter will make it easier to define what frequencies are eliminated from your car stereo system on the high and low end. This is ideal for separating the mid-range speaker tone from your tweeters. 

An included low pass filter lets you choose what and how much low frequency is sent to your speakers. The power terminals secure your cables with 4-gauge set screws and speakers connect to the output terminals with 10 gauge set screws. 

 If you’re considering a separate subwoofer amplifier for your vehicle’s build, the S1-850 and Q1-1200.2 are perfect playmates for sound quality and bass!

Open up new sonic options in your stereo system design when upgrading your stock speakers with the versatile S4-100 multi-channel amplifier.


Additional information

Weight 8 lbs
Dimensions 14 × 8 × 3 in

Default Title

4 reviews for S4-100 Multiple Channel Amplifier

  1. tdmitch

    I cannot believe that I am the first review on the website but, I’LL TAKE IT.
    FIRST OF ALL-this amp is really small. It is actually “crazy” small! Usually my mids and highs amp rivals the size of my bass amp…NOT THE CASE HERE. Beautifully crafted and designed. Crossovers are pretty precise and give you many options. My only issue with the S4-100 was the channel inputs. They seem a little light weight. They get the job done but don’t press the RCA’s too hard. Other than that, I think it is a hell of an amp for the price, design and performance.

  2. MakaDan340

    I installed this amp to power 4 DB Sylvester 6.5s, and I couldn’t be happier with the results. At first I was skeptical about using Class D for midranges, but it sounds just as good as the Class A/B it replaced, but much louder. I later added an AP 9 band EQ for fine tuning and also to send more voltage to this bad boy, and I must say that I’m really impressed.

  3. Alfred Coury (verified owner)

    I thought to myself as I pulled the arcaudio class g/h that will the added weight and advanced g/h that this would not sound anywhere near as good. (arcaudio doesnt like the cold). wired this little thing up and set some basics as far as clipping and gain, Multi-meter. I got to say the little AMP sounds great, nice and clear and loud . It sounds almost exactly as my arcaudio did down to I flattened the eq and started over by ear. way to go guys!

  4. Raphael

    I loved the specs and the performance of my S4-100 but it only lasted just over a year. I sent it in for service and I was told the alternator in my car could not support the load of my stereo system. Understanding that, I purchased a replacement. Well this one lasted longer. 1 year and 7 months later the second S4-100 died again. This time in a different car with an alternator supplying 100 more amps. Come on SoundQubed!

Add a review
ClassClass D
Channels4 channels
Working Voltage12-15.8 volts
Maximum Amperage75 Amps
Power @ 4 Ohm 14.4V100 Watts x 4 channels
Power @ 2 Ohm 14.4V175 Watts x 4 channels
Frequency Response10 Hz - 40 kHz
S/N RatioGreater than 80
Damping FactorGreater than 100
Input Sensitivity8 V - 0.2 V
Subsonic Filter20 Hz - 5 kHz
Low-Pass Filter50 Hz - 5 kHz
Dimensions in (LxWxH)7.87 x 7.75 x 2.24

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