I owned the lower end S-200 stasis Class A-AB amp (Class A to 20 watts) in the mid-late 80's. I would definitely consider the SA-1 monos or the SA-3 if you can find them. The "SA" designation operates in Class A bias, definitely better than the "S" series. They were the best ss amps of their day in my opinion and this compared to Krell, Levinson and Rowland.
Threshold?
I'm considering trying one of their older amps. Which one? I've never heard any of their products other than some Forte stuff. Sean has offered some advise. I'm looking at the lower end of the price line. Would prefer something that can put out about 200 watts into 4 Ohms. I've been told that the class A ones are the only ones to consider, that the pre T series sound better. Are the amps with balanced inputs truly balanced? What are the input impedance and sensitivity like? What non- Threshold pre-amps work well? For what ever its worth, I'm partial to the sound of Pass X series and Krell KMA 160b's. Please share your thoughts? As always thanks in advance.