Nakamichi PA7 versus PA7 II

" The PA 7 ran into class A, more than the PA 7II, which meant, a warmer sound than the PA 7II. "
Total BULLSHIT
I own a PA 7ll and Ive listened extensively to a PA 7  The ONLY difference between the two is the upper wiring, the latter being a birds nest of wires aka "Cottage industry" wiring vs Nakamichi's professional job of cleaning it all up and adding a few more watts.
BOTH amps are stellar and neither is "the ONE to own", they BOTH are.

Can it do well with thiel cs 3.6? Dips to 2.5 ohms for 65% of its frequency range.

They are both excellent amps. And, consmetically speaking, among the best looking.

I have a PA-7Aii. I've run it with Magnepan MG3a's and Martin Logan CLS's -the first generation that are difficult to drive. It runs warm, not hot, but drives both speakers very well. It is a little cold blodded and sounds best after it's run for 45 minutes or so and sufficiently warmed up.