Thanks Mr. Microsim,
This is not that big power,This is Alph1 Multisim Photo posted on this page post #94 .(More than 51 volt at out into 1 ohm with only 0.6% distortion full load more than 2.6 Kw.output with 16 pair 5200 1943 at only 80-0-80 D.C. Rail ) per channel.
I think that you are joking , 3055 never had collector-emitter voltage more than 70Volts . See here - http://www.farnell.com/datasheets/89481.pdf
And I don't believe in your bluffing about 2000-4000Watt amps , not mentioning 20000W
Also I see that you have much experience in simulators , but didn't notice any real measurments , via oscillogragh , THD-meter ( may take PC based , like this - http://www.ymec.com/products/dssf3e/ )
Your post 64 just shows a computer simulation nothing else........... Where are real oscilloscope captures?
ALPHA-1 P.c.b. designed by Mr. Munthe, gave problems, so redesigned orignal p.c.b. and making it.