Class B + Technics class AA sym Armaghedon

[dreamth]

As a continuation of my Germanium foudation Ch1 headphohes amplifier I tried even more simulations around a circuit that is intended to incorporate the Technics class AA buffer which I have tried in the past for headphones amplification and I/V conversion.I modified the original values of the Technics net so that the distortions got a little bit better and it happened that I had a lot of those resistors lying around.
You have essentially two variations A and B based on noninverted and inverted op-amps structures .While the noninverted structure can lead to lower distortions the inverted structure looks more stable with less compensation.If you wish to check some more things you have also the asc files. Ufortunately the only final transistor models that allow for such low distortions were the mje15032/33...but I have better transistors than all my ltspice sym library.If i get 1/th of the simmed performance I'll be utterly happy.Besided the first 4 trasistors , as some of you know will be...germanium trasistors, of course🙂
I already start building the inverted B balanced variation. The unusual choice for the 2k61 resistors was made just because I found some Dale resistors looking too sexi for my project.

 

[dreamth]

some more files...

 

[dreamth]

in short...

 

[dreamth]

Just some more armchair design around the Technics class AA and kenwood l01A output stage...2 ohm load 30 watts...and 8 ohm...supplied at -+12V