Categories: Power Amplifier

12W FET audio amplifier

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

Amplifier Circuit

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View Comments

Tony says:

November 11, 2016 at 2:54 pm

What is the recommended power supply voltage?
César del Aguila says:

September 26, 2017 at 2:13 am

I think +/- 24 is ok to drive the Zeners And the output transistors.