I like the simple way. The CCS is good enough for me.
Is my amp stable enough?
It's your decision.
Haw I can say if your amp is stable enough, you showed input stage only?
I will build this. Please give your opinion to optimize it. But I can not go to more complex than this, although it can give a little bit of performance rising. I am sorry for my bad English.
It looks quite stable with PM of 76 degree, and GM of 40 dB.
Just your Tian probe current source is up side down, I did that error before.
ps. If you want 200 W/8ohm you need to increase power supply voltage to +-70V.
I suggest to run the drivers with more current not just 20 mA, I would run it at 50 mA min.
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Can you send me the "right" asc file?
If the prototype work correctly, I will try use +-70V power supply, but right now I have trouble to get output transistor. May be I can change them with more popular type here.
Yes, I will run it to minimize crossover distortion, or may be a little over bias.
Btw, thank you Dadod for helping me using LTspice.
Why so high?
200W into 8ohms requires 56.6Vpk to the load.
I have reported just over 170W into 8r0 using unregulated (40,0,40Vac, mains transformer+rectifier+smoothing) PSU @ +-58.5Vdc.
I can't understand why you think you need another 11.5V on the supply to increase the output by just 4.3V (from 52.3Vpk to 56.6Vpk)
I you want to have relatively undistorted 200W/8 you need +-60V at that power, so with no load it should be, let say, +-65V as it will sag under full load.
Maybe +-70 V is a bit to much, depends of the transformer used(VA).
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