I think...Yes, in fact it better than many power amp around that price at the time. It was Nad first attempt to tackle the higher end market and rumour has it that the S200 share many common design with the awesome Gryphon Taboo.
This was part of their high-end Silverline series wasn't it? I think they still command good prices on the used market too - very impressive equipment I thought (and classy looking too with the understated design).