Browntrout conveys good logic, and I think I'll try what he suggests. I built my own version of a flexi-rack, except made it a rigid-rack. 1" oak shelves tightly fastened to 3/4" allthread with a 2" maple butcher block floating on top. Allthread legs are ground to points to pierce the carpet and under pad. Room is in the basement on a poured concrete slab.
So it makes sense to try and isolate my source, and couple my amps, pre and maybe dac.
I have a bunch of metal cones kicking about. My source, (cdp as transport), already rests on Herbies tenderfeet suppoting an isolation platform. The rest of the rig is on either sorbothane or rubber feet.
I do believe I'll give it a go this weekend.