Anybody listen to Ohm Walsh speaker w/digital amp?

There is some interesting discussion of Class D amps in this thread:

http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1229914799

They do, as you appear to realize, tend to have extremely high output current capability, and very low output impedance, which would account for the "grip" that you referred to.

BTW, if you'll allow me to make a minor point, it is a widespread misconception that the terms "Class D amp" and "digital amp" are synonymous. They are not, although even some manufacturers use the terms incorrectly. A digital amp would be one that has digital inputs, and dsp (digital signal processing) circuits to process those inputs.

http://en.wikipedia.org/wiki/Class_D_amplifier

Regards,
-- Al

Can somebody educate me briefly on what this "class A, class D," etc. terminology means?

This is a bit technical, but with a little patience I think you'll gain a better understanding than a brief oversimplified answer with no diagrams would convey:

http://en.wikipedia.org/wiki/Electronic_amplifier#Power_amplifier_classes

Regards,
-- Al