Whose got best class D at this point?

I have found the better class D amps sound only as good as the front end supplying them. No where in my audio experience shown the old axiom so true, "Sh... in sh... out."

On my system even insulated cords, at any price range, invariably hash the music, slight as it may be.

I meant insulated ICs, and SCs impart noise onto the music signal. Most
recently I got to try Cardas Golden Reference, and Jena Labs. Neither were
acceptable, the Cardas being the worse.

On the contrary, the PCs should absolutely be double shielded. Even the
cheapest power cables, metal shielded throughout their length, are far better
than the most costly otherwise power cables. Shunyata is a good example.

Spiro, There is absolutely no doubt in anyone's mind who have heard my
system concur IC insulation invariably imparts static into the signal. Bare
wire, or wire with just a thin sprayed coating don't. That is my system. The
Cardas was simply unlistenable. The Jena merely faired better.

Well shielded PCs are needed to defeat RFI emitted by the module. This RFI
will enter all other components that are not protected from it.

On the dielectric caused distortion, this may not be evident on some speaker
systems. If the preamp has excellent transparency as a great class D amp, a
very fine driver will pass the noise on. You can bank on it.