I agree dedicated lines are good. Short runs are also good. If you have high-power/high-current amps, maybe increasing wire gauge by a bit would be a good idea. If you are running the wiring now, a twist every meter on the romex would help with RF noise rejection. Grounded metal electrical boxes can help with that too. Keeping all the audio circuits on the opposite AC leg from the refrigerators and other noise-generating appliances is good. Good quality aftermarket power cords do a good job at the last few feet before the components. Keeping digital players in a separate circuit from the amps/preamp may help with isolating digital "hash" put out on the power lines from the digital equipment(infecting the power to the other components). Good grounding is important too.
Basic practices of keeping the power wires away from the interconnects and other sensitive signal wires is a good idea to minimize hum.
Just a few suggestions.
Basic practices of keeping the power wires away from the interconnects and other sensitive signal wires is a good idea to minimize hum.
Just a few suggestions.