In the mid 70's I switched from ARC tubes to the first Threshold product the 800A and later went to the SA1 and SA2. There aren't very many SS amps that sound better even today than the SA1 and SA2. Vintage Amp repair can keep them going. Last year I went back to big tube monoblocks but this is just a preference on the part of my wife and I. We could have easily afforded the Spectral but didn't like the sound. Topkat is right.
Does Threshold equal newer amp designs?
I remember in the 80's when Threshold had, to my ears, a more full-bodied, richer sound than other SS amps. Some called it a solid-state tube sound. Yet others thought they were analytical and sterile. There are those who think they sound as good or better than even the respected newer stuff out now. Why is Threshold still a popular item in the used market, if later designs are better? I'd like the opinions of former & current Threshold owners, and why you switched or didn't.