I used a DA-80 for awhile, that belonged to the shop I worked at. It was a very good solid state amplifier, and it ran hotter than blazes! Fry an egg on top, no problem! With the age of that amp, and the heat it endured while it was on, it is very likely that capacitor replacement is needed, as well as maybe some other passive components. All Stax products were very well built, and I always liked them.
Stax amplifiers....experiences
I just purchased a Stax DM or DA80 amp,(its being shipped to me) I believe it was a late 70s or early 80s amp from Stax, it runs in class A 45watts. I couldnt find much about the amp on the internet, wonder if any of you have owned any of their amps or perhaps the DA80.