# Class-A Mosfet Power Amplifier 2SK1058

DIY Mosfet Amplifier Class-A with transistor MOSFET 2SK1058 P-Channel Mosfet. This power amplifier circuit is a very simple design that produces in low stage output power. Basically this class A amplifier has a less good power efficiency, but in the use of Mosfet transistor slightly reduce the heat load on the transistor so that good impact on the performance of the amplifier. Still using a coupling capacitor on the output voltage to produce sounds that will be forwarded to the speaker. For the circuit and PCB scheme, you can see below.

Circuit Diagram:
Part List:
R1,R3 = 1K
R2 = 1M
C1 = 1uF / 0,47uF 50V
C2 = 33uF / 47uF 50V
C3 = 4700uF / 6800uF 50V
C4,C5 = 100N
C6 = 470uF 50V
Q1 = 2SK1058
RV1 = 47K - 50K Variable Resistor
RV2 = 100K Varible / Potentiometer
J1 = Audio Input
J2 = Power Supply DC 24V
J3 = Speaker Output Max 100W 4 Ohm

Note
At the Circuit diagram above there is not labeled Resistor before speaker output, you can add more Resistor before speaker output (+) with value 0.47 Ohm 5W 4x Parallel.

PCB Layout Design

Thanks for elcircuit.com guest, if you have done the project of this power amplifier you can contact me, I will add a post in here, such as picture or video. Or you may like this other post about Mosfet Amplifier below:

1. What the output power value?

1. is under 30Watt RMS at 4Ohm

2. Doyou have schematic for power supply circuit?

1. i dont have, but you can search in here about assymmetrical power supply. You can use transformer output 24V with rate 3A current.

3. Speaker output in (+ to speaker)and speaker output (+ to -) in 0.47om 5w resistor ??????

1. it is adding resistor on speaker output

4. 0.47om matching in 0.5 om ok sir
And 2sk1058 matching mosfet sir please send me....

5. 0.47om matching in 0.5 om ok sir
And 2sk1058 matching mosfet sir please send me....

6. excelente amigo

7. aunque tengo una pequeña duda la resistencia R3 no debería ser de 15 ohm y 50w amigo

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