I believe Sean is fundamentally correct in significant parts of what he is saying. Good recording studios routinely use large transformers, shielded low inductance in-wall wiring, dedicated circuits, and extremely low noise grounding systems for house current. It's not cheap to do, but it makes more sense than buying equally expensive audiophile line conditioners that are basically inadequate to do the a/c cleanup.
On cables, the jury might still be out. Perhaps it's just tone controls interacting with poor component design, but it would be nice to have a consistent understanding of why sound changes so much with cable design.
On cables, the jury might still be out. Perhaps it's just tone controls interacting with poor component design, but it would be nice to have a consistent understanding of why sound changes so much with cable design.