Maybe in terms of overall power, but definately not on sonics. The PASS X350.5 and X250.5 are both considered state-of-the-art solid-state stereo amplifiers, and imo sound better than any of the top-rated Class-D Amps that I have heard. My experience has been that PASS' X.5 (& XA.5) Amps are more sonically competitive with good Tube Amps, than with Class-D Amps.
Bell Canto VS Pass Labs
I was thinking on getting a new amp and recently told that the BC ref 1000 could compete compete with the 350.5 is this true?