Pass X-350 with Acoustat 2 + 2

Don't know, not my amp. I can only assess it outperforms ARC classic 150 monoblocks by a lot in the deep bass and soundstage side. Acoustats are heavy drinkers of power and the Pass is a very high current amp, class A must have a part in this !

I don't believe high current requires Class A operation.

Hi Brian, I ran the X 150 and X 600 on Duetta Signatures for some time. I don't think they are worth the price. There are others that have both speakers, but I don't know what amps they are using.

The 350 does run at class A for the first 100 watts. I had another fully class A amp for a time on the Duettas, and that was just great. It filled the stage with beautiful music.

The X-1000 mono blocks run to 128 Watts peak in Class A. Maybe I'm mistaken, but it's hard for me to imagine with that in mind, that the X-350 runs in Class A to 100 Watts.

Checked it out with my friend. As per the unit's manual, the first 75 watts are class A. Therefore my comment remains the same except it is 75 watts instead of 100.