Tag: b688

The 500W amplifier circuit diagram presented here is a powerful audio amplifier design capable of delivering high-quality sound output. This circuit utilizes five pairs of 2SD1047 and 2SB817 transistors in the output stage, along with one pair of 2SD718 and 2SB688 transistors in the driver stage. Additionally, the pre-amplifier stage features the widely-used 4558 IC.