Danny, I own the FetValve 550EXR. The quality of the amp is excellent. Frank van Alstine does not use solid gold binding posts, or lamb placenta chassis linings to absorb EMI. He builds well designed components without pomp, but in a very well executed fashion. You won't have to worry about poor craftsmanship with his stuff.
The sound is very excellent. My EXR is musical, dynamic, with tremendous bass authority and extension. There is not one aspect or the other that "sticks out" with the FetValve amp. Airy? Yes. Great soundtage? Yes. Liquid and organic? Yes. One thing it is not is classically tubey. If you are looking for that in the midrange you won't find it. Yes it's great in the midrange (and I've heard the Ultra is better), but Frank does not build amps that fall into the "classic" sound categories. The FetValve sounds neither like a FET nor a tube; it's better than either. The nice thing about van Alstine's gear is you can try it with a pretty generous trial period. If you don't like it you can send it back for a refund (minus shipping, of course).
The sound is very excellent. My EXR is musical, dynamic, with tremendous bass authority and extension. There is not one aspect or the other that "sticks out" with the FetValve amp. Airy? Yes. Great soundtage? Yes. Liquid and organic? Yes. One thing it is not is classically tubey. If you are looking for that in the midrange you won't find it. Yes it's great in the midrange (and I've heard the Ultra is better), but Frank does not build amps that fall into the "classic" sound categories. The FetValve sounds neither like a FET nor a tube; it's better than either. The nice thing about van Alstine's gear is you can try it with a pretty generous trial period. If you don't like it you can send it back for a refund (minus shipping, of course).