I would like to add that I own a pair of the Carver M 350 Black Raven/Beauty Amps. These amps replaced Ralphs Atma-Sphere M-60’s Mk3-3, which replaced a Pass Labs 350.8, 350.5 and before that a Krell KSA 250. I actually had Bob stay at my house for a couple days when I was also trying his Line Source Speakers. (I didn’t like them).
To my ears and present equipment, these amps are very good in terms of sound quality and power available. Of course, as noted, I haven’t tried too many amps.
And BTW, I still own and operate one of the Carver M400 cube amps in my game room.
ozzy