12W small audio amplifier circuit diagram analysis

This is a small 12W audio amplifier with an 8Ω load that combines the NE5534 with a pair of V-MOSFET transistor output stage technology for excellent sound performance. This circuit uses Hitachi's MOSFET2SK135/2SJ50. The circuit has a maximum input sensitivity of 3VRMS, a distortion factor of 0.002% at 1kHz, and a frequency response of 15Hz to 100kHz. (-3dB).

This circuit requires a symmetrical (bipolar) power supply with a voltage output of +/-25V and a current output of 2A maximum.