This is a small 12W power amplifier on a load of 8 Ω, that combining the NE5534 integrated technology with transistors as V-MOSFET output stage get an excellent sound quality. The input sensitivity is 3V rms maximum, the distortion factor is 0.002% at 1 kHz, and frequency response is 15 Hz to 100 kHz. (-3dB).
12W FET audio amplifier parts list :
R1 33 kΩ | C1 1nF 63V | D1 1N967B zener 18V 0.5W |
R2 6.8 kΩ | C2 47 µF 40V | D2 1N967B zener 18V 0.5W |
R3 22 kΩ | C3 100 nF 63V | D3 1N4148 |
R4 100 kΩ | C4 100 nF 63V | D4 1N4148 |
R5 1 kΩ | C5 47 µF 40V | Q1 2SK135 |
R6 330 Ω | C6 4.7 pF ceramic | Q2 2SJ50 |
R7 1 kΩ | C7 100 µF 40V | IC1 NE5534 |
R8 10 kΩ | C8 100 µF 40V | |
R9 0.47 Ω 2W | ||
R10 0.47 Ω 2W | ||
R11 10 kΩ |
What is the recommended power supply voltage?
I think +/- 24 is ok to drive the Zeners And the output transistors.