I have owned the pass 60 and I own the Mac 352. With the stock tubes the pass sounds more tuby. The pass 60 is a phenomenal sounding amp. I traded it for my Pass 250. In a lot of ways I like the sound of it better. The 60 has a very warm sound that is very engaging. The Mac 252 is more like the sound of tubes than the 352. The pass 60 also sounds a lot more powerful than the 352. Keep in mind, the pass 60 gets very hot. Hotter than my 250. Good for winter, not so much in summer. I have 4 integrated amps, and my pass only gets, in rotation in winter.
Mac MA 352 vs Pass INT-60
I've had an order in for the Mac MA 352 for 3 months and supposedly it's coming shortly. I wanted the tube front end but now I've got an option since I no longer think I need a balance control and I just found a really good deal for a new Pass INT-60. I'm running these, hopefully, into KEF R7 Metas at 88 dB. I figure the Pass is adequate into those 4 ohm speakers in my 25x14 space. I also figure the Pass has as much tube-like quality with likely a better high end than the Mac. If price is not a factor, what do you think? The Pass is a beast, but I can deal with that, and my first real amp was a Threshold 400A. I have some worry about current delays in Mac serviceability also. :)