IHave a friend who is a Audiophile and master electrician he did mine
awg 10 wire, 4 wire a common ground, and a isolated insulated ground using a separate buzz bar in the breaker box , a pure silver 30 amp breaker from Germany
land all copper gold outlets ,a Siemens surge protection at the input to the breaker box and all equipment have Furutechs best IEC inputs which is very important , as well as every rca,xlr,and connector all WBT ,or Furutech the system sounds so much cleaner, the majority of mfg use gold over
brass which means 3x less conductivity then Copper,which = 3x more resistance
which = low level distortion which can be measured ,I use Xlr which truly make a difference ,especially if you digital, and amp,preamp are Differentially balanced .
everything counts.