Nakamichi PA7 versus PA7 II


What is the difference between Nakamichi PA7 and PA7II?
Also,are this amps classA?
Thank you
walther
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.