Older PURE CLASS-A Amplifiers

Personally, if I were going to get an older Class A amp I would wait for a Threshold SA series 1 or 2 (both mono's) or a 3, depending on power requirements. The original SA3 is a real sweetie and a bargain at typical sales prices. Apart from that I would also consider the Classe DR3 either the regular or HC depending on speaker requirements. These are great amps, different perhaps, even compared to todays products. Of your list the only one I'd think about would be the Threshold T-50 and, before I thought about it much, I'd want to be sure the output devises are still available in case of a failure.

I know of one who owns some 20-plus year old Classe model D-25 (I believe) and really enjoys them. He also has had much exposure to and has owned some outstanding amps.

-IMO

I owned an SM70 and currently own a pair of the Monarchy SE100Delux's. The SM70 was a sweet little amp. I just sold it but it was hard to let it go. Was looking to buy another one and run them as monos but could not find another one with matching faceplate. The only problem I had with the SM70 was that it ran hot. It doubled as a space heater in my little 10x9 office; good in the winter but not so good in the summer.

Hope this helps,

Threshold sa-1 or sa-2 mono bloc amps are still considered the best of class a sound today. They are just very tough to find.

Chang

Gryphon mono blocks DM-100. Excellent amps.Threshold Amps are too bright for my taste.