Jeff Rowland or Mark Levinson???

anyone compare them to Pass Lab X350 or X250?

well all i can say is: i love my 8T with my consonance driving my alon V MKII with millerized woofers "millersound" i have friends coming over that have much more money invested in their sound and they say they just can't match the sound my jr's put out

if you are looking for perfect bass control and great authority, hear to the JR 312 ...
this is really amazing

I'm voting JRDG after buying a full set of his recent gear. The man is an amazing designer.Although very quiet with virtually zero promotion he is still working 10 hrs a day.Just saw a blurb in TAS by RH that he too is smitten. HP had already offered highest praises fwiw.The 625 stereo amp that I have drives Revel Salon 2's effortlessly.

I've owned Jeff's model 8 with choke for about 20 years now and it still brings a smile to my face. VERY few ss amps can compete with it even today...20 years later!