Jeff Rowland

I was reading in Stereophile about how the older Jeff Rowland Amps sounded great and were classics. The writer said Rowland was good up to the Concentra II but not the Concerto and anything with "rounded corners." I think the Concertos were where JR started using class D amps. Is that the case? Do all models use Class D now?

I'm sure I don't want anything with class D at this time as many reviewers have commented on the treble as being glassy or something wrong with the sound of it. The highs are what make or break a piece for me so I'm not going anywhere near Class D right now but am considering giving Rowland a try for a third system I'm building.