Bob, I read the linked ad. Since the unit has no output transformer it wouldn't suffer from the high output impedance that many tube amplifier designs exhibit. Therefore the frequency response irregularities that can occur with a high output impedance interacting with changes in speaker impedance at varying frequencies wouldn't occur. Within its power capabilities it could be expected to match solid-state designs, and not exhibit a flawed "tube sound". Some of the claims in the description as to special qualities are pure BS, of course.
