I would run a sub-panel near your equipment with plenty of amps to the sub-panel. If you have high powered amps run them on their own circuits which could be up to 20 amps each. Most likely you can power all your other equipment on one 15 amp circuit. The amperage draw by your amps will definitely increase based on volume level. The other equipment will remain fairy consistant regardless. I ran a 100 Amp sub-panel with Two 15 Amp circuits with 12/2 wire and one 15 amp circuit for the tube preamp, streamer, TV and modem/router. I used to see the voltage slowly drop from 121 to 118-117 when the amps were driven hard. Now it stays pegged at 121 regardless.
