Ignoring science, just instinct,
I keep my amp and preamp on one dedicated circuit, and all the source equipment powered from any household outlet on any circuit without equipment that surges on/off like refrigerators, fans, compressors ...
I keep my amp and preamp on one dedicated circuit, and all the source equipment powered from any household outlet on any circuit without equipment that surges on/off like refrigerators, fans, compressors ...