300W Power Amplifier With MJ15003 and MJ15004
Conventional power amplifier with high-pass and low-pass filter. Supplied 60V DC, this circuit can produce about 300W sound power. Opamp NE5534 is arranged as a differential amplifier, output of NE5534 is applied to drive stages MJE340 and MJE350 via R6 from pin 6. The output amplifier proper consists of drive stages MJE1530 and MJE1531 and power transistors pairs of MJ15003 and pairs of MJ15004, which have been arranged as symmetrical power darlingtons.
Component Layout
PCB Layout
[source:HobbyElectronic]