I used to prefer tube amps for some listening, but after hearing the White Oaked Phase Linear amps, I can't go back...the power from the Phas Linear is just so pure, powerful and sublime, all at the same time, I don't need that tube sound...the Phase is a combination of all the things that make Tube and Solid State sound so different...I didn't know SS could sound so sweet and musical...all the while having brute power waiting to back it all up.if that makes sense. I really had my White Oak Moment with a Phase 400 playing Diana Krall, believe it or not....The amp was cranking all she could, but I had that moment where I was there in the venue with her...every nuance of her voice, and every sound from the piano.....it was awesome...