Class "D" amp? I do not have a clue. Do you?

Kij,
I gave up listening to sine waves sometime soon after I survived the '70s.
Zobel limit on long term power is therefore pretty much a non-starter.

One other MINOR issue, I don't think yet mentioned, of 'd' /ICE is that the frequency response changes as a function of speaker impedance. Lower impedance starts rolloff earlier. The ASP1000 module is worst in this respect being what....about 1/2 db down at 20khz w/4 ohm load?
Give up, at least for now, the idea of flat, wide band response out to X-ray.

I have been an audiophile for over 30 years and after owning tube amps from Conrad Johnson, to Michaelson Austin TV10,VTL,Grant Lumley,AtmaSphere OTL and SET from Cary and a host of good solid state amps, I now enjoy the Red Dragon Leviathan mono blocks-which if you haven't a clue about class D then you wouldn't know anything about my amps either.

All I can report is that I find much to admire about them, little to fault, and that they have been on 24/7 for over a year and no problems.

If they have a "sound" it is something of a cross between a good tube amp and a good solid state amp.
They are smooth, detailed,non fatiguing and have as much power as you are ever likely to need.

They sounded great on Merlin TSMMX,high eff. Tanoy Arden(dc)and on Ref 3a Grand Veena.
They emit no hiss, hum, or any snap crackle or pop.

Noises that most of my tube and solid state amps had.

Th

I leave my Class Ds on 24X7 also with little concern, except if I am away for more than a day or so I will turn them off.

"The ASP1000 module is worst in this respect being what....about 1/2 db down at 20khz w/4 ohm load?"

Magfan - you're right (just checked datasheet graphs) but 8 ohms have too much down and up by 1/4dB starting in less than 10kHz. My Rowlands 200ASC is a little better - it dives down about 1/4dB but comes back to 0dB at 35-40kHz. Phase shift over 20kHz is also smaller - effect of higher carrier frequency.

Mapman - I was turning everything OFF but now I have Furman Elite 20 PFI conditioner with non-sacrificial over and undervoltage protection and keep everything ON all the time. It clamps at much lower voltage than traditional MOV protection.

Another very good brand of class D amplifiers is H2O Audio. They use ICE moduals but are powered by a very beefy torroidal transformer based power supply.

I've recently tried the H2O mono amps driving the Magico V2 speakers. They mate very well together. Better I think, from a synnergistic standpoint, than the Pass XA100.5 mono amps because of the extra bass control and frequency balance. In general I don't think that the H2O amps neccessarily sound better than the Pass XA100.5, but in the case of the Magico speaker wanting power and control, the match with the H2O amps was very, very nice.