power supply is completely self-contained, including a microphone pre-amp, audio processor, and bass and treble controls

The pulse width modulator shown above will supply approximately 320 watts (40 volts at 8 amperes) of modulated DC into a 5 ohm load. The output can be boosted to over 400 watts (45 volts at 9 amperes) by adding a 10v to 12v "boost" transformer in series... READ...

READ MORE - power supply is completely self-contained, including a microphone pre-amp, audio processor, and bass and treble controls