Nakamichi PA7 versus PA7 II


What is the difference between Nakamichi PA7 and PA7II?
Also,are this amps classA?
Thank you
walther
Just sold my beloved PA7 was the original owner and had it for 25 years. It was a very balanced amp with a beautiful and detailed midrange. I dont believe you can find a better amp for $700 - 900 dollars. Never had one problem with it and was still sounding like the day I bought it when I sold it.