S4-100 S Series 4 Channel Amplifier (175x4)


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Usually Ships Within 1-2 Business Days
Minimum Purchase:
1 unit
Number of Chnnels:
4 Channel
Power Handling @ 4 ohms:
100 watts RMS @ 4 ohms
Power Handling @ 2 ohms:
175 watt RMS @ 2 ohms
Terminal Size:
4 AWG Power/Ground inputs
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Product Overview

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.


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


Model S4-100
Class Class D
Channels 4 channels
Working Voltage 12-15.8 volts
Maximum Amperage 75 Amps
Power @ 4 Ohm Stereo 100 Watts x 4 channels
Power @ 2 Ohm Stereo 175 Watts x 4 channels
Power @ 4 Ohm Mono 370 Watts x 2 channels
Frequency Response 10 Hz - 40 kHz
S/N Ratio Greater than 80
Damping Factor Greater than 100
Input Sensitivity 8 V - 0.2 V
Subsonic Filter 20 Hz - 5 kHz
Low-Pass Filter 50 Hz - 5 kHz
Dimensions in (LxWxH) 7.87 x 7.75 x 2.24

Warranty Information

SoundQubed warrants all products to be free from defects in materials and workmanship for normal use and service for a period of time not to exceed 12 months for subwoofers, components, earbuds and coaxial and 12 months for amplifiers from the original date of retail purchase. Parts returned must be determined by SoundQubed to be defective prior to any warranty credit or replacement is issued. SoundQubed’s obligation under warranty shall be limited to repairing or replacing, at its discretion, any part proven defective. The customer must prepay transportation charges. Final determination of the suitability of the products for the use contemplated by the buyer is the sole responsibility of the buyer. Warranties are non transferable. Warranty Exclusions Burnt or open coils Customer abuse or competition use and power in excess of rating Amplifiers used in competition or run below rated ohm loads or voltage Improper wiring, including size/gauge, paths, termination method, and series/parallel configuration SoundQubed shall not be liable for any special, direct, indirect, incidental or consequential damages that might be claimed as a result of the failure of any part, including claims for delay, loss of profits, or labor SoundQubed shall not be liable for any damages or injuries to persons or property resulting from improper installation or misuse of any part subject to this warranty THERE ARE NO OTHER WARRANTIES EXPRESSED OR IMPLIED EXTENDING BEYOND THOSE SET FORTH ABOVE


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