Class D Technology

Rowland model 102.  There are many class A or AB amps that have similar bandwidth but nobody talks about phase shifts.

The JR 102 uses the Ice 200asc modules as you are probably aware.

Look at the distortion figures for the highest their willing to put up in red which is just at 6.5khz. Look how fast the distortion rise is for the given wattage. And this is all at just 4ohms, I would love to see it at 2ohms.
If you can then visualize just what the 15khz one looks like, if they rise this rapidly from 100hz to 1khz to 6.5khz you have an idea of what’s going on the upper mids and highs.

Then you can imagine what happens if the’re driving an ESL speakers which can go to down 1ohm.
This is just one I found I'm sure there's more if I dig.
http://www.icepower.dk/images/200asc_700px.jpg

Cheers George

There are many class A or AB amps that have similar bandwidth but nobody talks about phase shifts.

That’s because good ones are usually much faster, and they don’t freak out at low impedances like ClassD does in distortion and loading.

I like to see bench tests v reviewers subjective listening. As Stereophile does.

But here is what a reviewer from another mag said subjectively, without any bench test to back his listening.

" Here is what the amp doesn’t do. It isn’t airy and it isn’t laid back."

Good highs are airy, they float with harmonic structure.
Cheers George

Georgelofi - you are talking about harmonic distortion below 0.1%, that are inaudible (unless you're a bat, of course).  I've noticed that you also tried to apply psuedo-science to sigma-delta converters.  I am afraid one day you'll find that SACD is the same.

George im guessing you should be looking at specs and data of the Rowland amp not the ice module it uses alone. I’m pretty sure Rowland like others do things like beefed up power supply to achieve performance. Again I think you are selectively choosing your facts and data to support your case. Are you a lawyer? Many of these amps get rave reviews and are happily owned by many. Your technical case for why these must sound bad does not add up. Plus I can assure you the newer good ones done right are right up there. It’s ok if not your cup of tea for whatever reason. But that’s about it. If I had listened to the skeptics a few years back rather than drawing my own conclusions to take he chance I’d have maybe missed out on years of enjoyable music by now.