The High power mosfet amplifier circuit ideas has been very popular, because the sound is very aggressive, as compared to transistors and ICs. It can be low-frequency and high-frequency response as well, it is highly durable. Usually, if compared with the same sound. It will devices less. Due to the bias the voltage. Easier to control current. But some people say. If the power MOSFET output loss, more expensive power transistors. I agree with this, but,Is it not so bad. Today I have circuit collection of more than 150 watts of power, so it is a good idea for you. Hope this is helpful.
There are 3 circuits, as follows. (see below!)
(1.) 300W Mosfet power amp OCL HIFI Class AB by K1530+J201
Younger student brother will take an interest to do electronics project sends a teacher. Then come to consult with me. He wants to build Mosfet power Amplifier 300W rms model the stereo Amp. Which be the character OCL the sound is good. I then try to seek the circuit gives him sees in rows the way , accidentally meet this circuit. which design by Anthony.E.Holton. He designs this circuit well. Use power 2SK1530+2SJ201 MOSFET x 4 jigsaw puzzle parallel amounts. make have power amplify tall arrive at about 300W rms true power FULL watt. Detail other part want friends see in original circuit.
(2.) Power amp ocl Mosfet 160W by 2SK134+2SJ49
This the circuit mosfet power amplifier OCL 160Watt sizes are full RMS. For 8ohm size loudspeakers build to sing bail 18 inch sizes well. By use mosfet cherished possession pair the last classic 2SK134 and 2SJ49 then have the durability is superb. This circuit not new handily. Should consider well before build. but difficult exceed nothing extremely amateur type our electronics ?
From the mosfet power amplifier 60 watt that I have presented in day ago.
Friends may be interested the circuit that higher power, I suggest to try this circuit.
It has power is 180 watt,uses a device similar. Point of interest is the power mosfet transistor output NO. J50 and K135(be durable voltage 70V) connected parallel together it can drive power output is higher. When using a 70V power supply with 8 ohm load to power output of 180 watt RMS.
Section differential amplifier input is designed with high performance. It is a a good idea for you.
Unfortunately, the the circuit is not clear. It is about 20 years ago.
power amplifier OCL 180W MOSFET J50 and K135
(3.) 240Watt Mosfet amplifier using BUZ23
At this empty period as a result seek Mosfet amplifier circuit keep give friends see in rows think out. For this time I meets this circuit , about 240watt. When use 4ohm – 8ohm loudspeakers which this circuit designed keep well , make have sound perfect power very much , both of the popularity in the sound , respond sound frequency has fully , and the durability , systematically protect the damage. All over amplifier by oneself and a loudspeaker that is usable. If a friend wants music amplifier circuit. I thinks this circuit may meet the demand your sure sir.
Caution! This project needs to use the speaker protection circuit. Otherwise, your speaker may be damaged.
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