150W Quasi Amplifier

Fuck u

siriusly? This is not youtube.

Ignore the troll. To the circuit, not fine aligned and why you call it Quasi? Its a normal power amp. The only thing which makes it nonstandard is the full NPN outstage. This is an old design were npn's were available and matching complementar PNP's were hard to get. This is still today not easy. You have to understand how the difference is to a standard push pull architectur. The VAS (Voltage Adapation Stage) before outstage must be different. If missconfigured the quitesense current is to high and unbalanced. In this case here only the upper NPN's burn in idle about 30Watt for nothing. And the lower NPN's are off. Break it down to a very simple curcuit and try to understand what voltages you need at NPN's upper and lower ones to get Class AB behaviour. Keep it up.

@hurz Thanks! I know it quasi because the output stage is made of the same polarity transistors like quazi complementary npn and pnp. And yeah this is unstable and the feedback resistor in the original is 220Ohm don't know why. As for my designs my Teacher will give me a book for this things and I'll learn how to make them better cuz even in real life my amp aren't stable. But my "DX Amplifier my version" Did Great and sounds nice. I vave allot of Unleashed amp but i don't make em public cuz of this stable issuse and some are secret cuz i'm planing to sell them. Sorry for bad grammar.

The literature on that website is screwed up. Be careful taking direction from there.

I know i blew a channel from their circuits before now I know and i try to fix them