IMO the higher-end Mac's sound better than the high-end Pass amps. I've listened to both and although I had high expectations for the Pass stuff, I just wasn't impressed. Listened to a nice setup on some huge Genesis speakers. It did sound different but not that great. Also the volume was scratchy when adjusted which gave the appears of lower quality. The high end Mac system I heard on Focals was one of the best systems I'd ever heard - in my top 3 of all time in fact. Now the low-end Macs (integrateds) are a different story.
Macintosh vs Pass labs
I currently own a Pass X250 which is awesome. I am driving Von Schwikierts VR4 SR also awesome. I have always wanted to try a Mac amp. However I am wondering why there are always so many for sale. Pass amps are few and far btween. Maybe th grass looks greener on the other side. Thanks