Class D

madavid0: Something to keep solidly in mind when reading about how wonderful this or that class D module is that the commentator probably doesn't have even a decent system and his standards are very low. That seems to be the general rule with people praising class D.

A bold and laughable generalization. If you consider a system with an Apogee Scintilla or Technics SE-R1 "decent" then you don't know much.
If your argument is based on a low end VTV without even a linear ps, then you know even less.
Note: I had to edit this as it was removed by the moderator. I didn't realize there are some here who are so sensitive!

As good as I like to say Class-D gets with the Technics SE-R1, I still don’t think it’s a good amp for driving the Scintilla’s 2ohm load, compared to big linear bi-polar amps, that can really dump many more amps (current), especially when the Scintilla’s are in the better sounding 1ohm mode.
I head them at the Apogee/Krell dealer 20 years back, Len Wallis Audio, driven by a pair of these Krells, and the sound was to die for, speakers disappeared and had a sound stage and depth you felt you could walk into and greet the artists.
https://i1080.photobucket.com/albums/j329/ALE7575/stereogear3_zpsc311def0.jpg
475W into 8 ohms 
850W was available into 4 ohms 
I measured 1060W into 2 ohms, the AC line in our Santa Fe office was sagging significantly for this measurement.
   
Cheers George

No, I’m not pairing the Scintilla with the SE-R1 - that’s why I said "OR" not "AND". I meant a system with either of those pieces is simply more than "decent" - much more.
I know what works great with Scintillas and class D, as I noted above. And I know of old school amps that work great with them as well. Yes, I’m referring to the 1-ohm version.
Staying on topic...

@art_boston it's a generalization but one that seems to be borne out time and again. It's what's made my forays into class D so frustrating. 

I purchased a Rotel RMB-1575 just as a first plunge into the class D world. It’s 250 watt x five channel in 8 ohm, 500 watt @ 4 ohm. My RBH Reference gear is four ohm. This amp could destroy my basement with freakish volume and all the while, cool to the touch. I drove a twin pair of reference subs that use twin 10” reference drivers as well. Shakes the foundation. It’s 18 lbs, makes no sense to have that kind of power 

and the sound is absolutely beautiful.