Pass Labs Amp X350.5 or X350.8 anyone compare?


I have searched for some opinions as to the sound quality comparison between the older Pass Labs X350.5 which I own and the newer X350.8.
It looks like the .8 does not operate as much in class A as the .5. But, that doesn't tell the story.
Anyone have a chance to listen to the newer X350.8? And if possible how does it compare to the X350.5?
128x128ozzy
Thanks again, Ozzy. So I take it a long break in time is key to success. My current speakers (JBL S4700s) were like that; they were dreadful out of the box, and now they really rock the house. However, it took at least 200 hours of break in to even get close to where they are now. A word of warning to any prospective buyers out there!

Anyway, it's good to hear that the new Pass Labs amp is a winner. Again, I was worried for a minute there. If it were me, I probably would have had buyer's remorse! lol.
@ Dave_72

Pass Labs is overkill on JBL speakers IMO.

Get decent High End speakers first.
@ Don_c55

JBL S4700 is maybe not the most refind loudspeaker. This 20.000 dollar set of speakers can still be a good combo with Pass labs. Because you need the power, control and musical sound for the JBL S4700.
Thanks Bo. Exactly. I dunno what this Don_c55 guy is talking about. I doubt he has heard the high end JBLs thoroughly. The S4700s *when broken in* can be very delicate indeed. And furthermore, they fit my listening profile as I listen to mainly classic rock, blues, and free jazz. With a little metal and punk on the side. So basically, I like them, they're the right speakers for me, and that's all that matters.
Ha! Clearly Don_c55 didn't know anything about the actual JBL speakers that Dave_72 owns. $20,000 is not mid-fi.