I have heard the 150.8 vs. the 250.5 and the xa25 (along with Parasounds JC1s, Merrill Veritas, and lastly a Gryphon Diablo 300. The 150.8 was the most analytical of the pass amps - I liked the 250.5 the best of the Pass. The xa25 was a little too warm to me - it sounded like the "jump factor" of a hard snare drum was lost, if that makes sense.
Like everything else in this hobby, YMMV. Reno HiFi has a nice testing policy, I’d try to get whatever amp you are aiming for in your home and give it a listen for a few days.
Good luck!
Like everything else in this hobby, YMMV. Reno HiFi has a nice testing policy, I’d try to get whatever amp you are aiming for in your home and give it a listen for a few days.
Good luck!