SBS Designs S4 Variable Supplier Amplifier    


The SBS Designs S series Class AB & Variable supply amplifiers are a hand made high end design, designed to deliver the finest results to your loudspeaker system. When you are looking for the finest reproduction of sound with the purest power going to your monitors & loudspeaker system, High End Class AB & Variable supply amplifiers by SBS Designs are your only choice for the ultimate reproduction & fidelity.

The S4 is a variable supply amplifier that can be used for a variety of demanding applications.

Studio Ref Monitors:
These systems include (but are not limited to) small, medium or large full-range systems. On Bi-Amplified or Tri-Amplified studio Ref monitor systems, S4 would work amazing on Sub-Bass or Mid-bass components for the ultimate output, depth & resolution.

Sound Reinforcement:
The S4 works amazing on full-range loud speakers, on Low mid-range components, such as Mid-bass or on Sub-bass.  S4 can be applied to DJ booth monitors, low mid-range drivers in sound reinforcement, Even audiophile systems where accuracy and wide dynamic range are a must.

Live PA:
In Live PA applications, S4 is a perfect fit for Low Mid-Range cone drivers or on Compression drivers in Line Array settings, where pin point accuracy and high fidelity with the ultimate frequency response is 1st priority.



Recording Studios
Mastering Studios
Live PA
Nightclub Applications
Sound Reinforcement


450 watts @8 ohms per channel
800 watts @ 4 ohms per channel
Input Sensitivity 1.4 volts
Slew rate 70 v/us
THD .04%
Damping Factor 250
Class AB + variable supply output, featuring fully Class A drive sections
3RU – Fan Cooled

Frequency Response

10 HZ to 60 KHZ


10 years