Fuhjythy Amplifier Board Amplifier Board AB400 400W X2, TA1943/TTC5200 2.0 High Hifi Power Amplifier for Passive Speaker

The board design has a perfect protection circuit, including switch delay protection, to prevent impact sound. AB400 dual channel professional stage amplifier board circuit design is and stable, the use of double differential input and increase the input signal processing, the push stage with a pair of 1930/5171 and 5200/1943 to do compound push, and then 16 tubes to do the power output stage, the output power up to 400W+400W. Midpoint voltage protection, overcurrent protection, high temperature protection, and cooling fan interface. Great power, strong low frequency, rich details, the circuit adopts DC feedback design, good analytical power, good bass deep elasticity, stable work under high power, retracting and retracting freely. TTA1943/TTC5200 audio tube, carefully matched after assembly.