Oh how I wish Class D amps ...

"Audiofeil, you know how low ICE impedance runs"

It is 10k - just a little low but many class D manufacturers use additional input circuit that increases impedance. My Rowland Icepower uses THAT1200 instrumentation amp to obtain 40k input impedance. Others use transformers.

Low input impedance is not related to class of the amplifier or modules used but to practical implementation. For instance the newest Rowland 625 class AB amp has 10k input impedance - by designer's choice.

My Benchmark DAC1 has 60ohm output impedance at 0dB XLR output jumper's setting (that I use) - no problem even with 10k input impedance. The worst case is at -10dB jumper's position making output impedance 1.6k. It might look to high for use with Rowland 625 but this impedance is resistive (output divider) and will only alter output level by -1.3dB

I would think a low input impedance would better suit most ss pres than most tube pres?

Unsound, I think he was talking about the input impedance, not the output impedance. I could be wrong, but that is the best I can make out of:

you know how low ICE impedance runs. Solid state preamps have great trouble with this.

But how could there be a solid state preamp that could not drive the low impedance that tubes or a passive can? That part does not make sense. Muralman1, I think you need to restate whatever it was that you were trying to say here.

Atmasphere your question mirrors my thoughts, we're on the same page. :-)

My theory, at least for the better icepower Class D amps out there, is that one may have to have a setup that is capable of doing imaging and soundstage really well in order to appreciate these amps fully.

I have several speakers set up in several rooms running off my system. The Class D amps differentiate themselves best from what I had before in my two better rooms in this regard. In the other two, the differences are nominal, and in my worst room in this regard, one used more for casual background listening with less power hungry speakers, I do not hear any clear improvement with the BCs.