I have used the Threshold S300 for over ten years and am about to acquire a mint S550e (see earlier thread from me). I have not had nearly as much experience with other amps as some of the writers here, but I used the Mac 352 as a comparison before buying the s550e. I liked the s550 e better. It could be just a Threshold bias, but I really like the strength of the s550e and is just seems effortless in the other regions. To me, it is really revealing without being harsh. And, I think the Pass designed Threshold pieces will always be sought after. Compared to comparable new quality, they are a bargain. Hope this helps.
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.