The A400S gives out 200 watts per channel, for a total of 400 watts.
The A400S is designed with a High End circuit with very low-noise FETs. A balanced, complimentary differential input circuit makes the A400S even more linear than other systems.
The output stage has three pairs of high current, paralleled, bi-polar power transistors to meet the peak current demands of any speaker system.
Dynamic transient sounds come through with full impact and clarity. Servo-controlled, direct-coupled circuitry is used throughout the circuitry for extremely high resolution sound.
Amp is in perfect working condition. One small mark on top about 1/8" and a few rubs around an output connectors but over all very very nice. Perchased from fellow member. Sounds very similar to the Parsound JC-1's to my ears. Excellent amp and a killer at this price with excellent reviews.....