When I upgraded my 12/3 romex junction boxed house wiring to a dedicated sub-panel with 20 amp breakers for each run of metal clad 10 g BX, there was a very substantial improvement.
With the old 1972 wiring my class D PS Audio HCA-2 was creating RF that could be heard through a Sony clock radio on the other side of the dwelling. After the upgrade to the volts AC the RF stopped and the performance of the amplifier as well as the rest of the system was noticeably better. The work was done to a raised ranch style home by a licensed electrical contractor for less than $1,100. Clearly the best dollar for dollar system upgrade/tweak to date.
Lastly, I made some DYI 10g shielded power cables. I can't say if was the the larger wire I used or shielding the cables or both, power cables can absolutly make a difference with class D amplifiers. In my experience they don't like silver anything and the more copper the better.
With the old 1972 wiring my class D PS Audio HCA-2 was creating RF that could be heard through a Sony clock radio on the other side of the dwelling. After the upgrade to the volts AC the RF stopped and the performance of the amplifier as well as the rest of the system was noticeably better. The work was done to a raised ranch style home by a licensed electrical contractor for less than $1,100. Clearly the best dollar for dollar system upgrade/tweak to date.
Lastly, I made some DYI 10g shielded power cables. I can't say if was the the larger wire I used or shielding the cables or both, power cables can absolutly make a difference with class D amplifiers. In my experience they don't like silver anything and the more copper the better.