My third build using Apex Microtechnology power op-amps. This one with the high power PA04 MOSFET chip since the amp was built to drive four subs. The design has 4 channels in a dual, 2 channel configuration, with two power supplies. One side puts out 2 x 140W into 4R when both channels are driven just below clipping. The PA04 chip is capable of 400W according to the data sheet, but I certainly don’t need 4 x 400W at home, and I wanted to get it all in a 19” 2RU case anyway.
The case is made mostly from recovered e-waste with the aluminum panels from an old Apple G5 Mac and the heat sinks from industrial servo drives. The extruded brackets, handles and feet were all that was purchased for the case.
Been listening for a while now and very pleased with the results. Thanks for looking.