I rewired my home entertainment system when I saw a good deal on a 125’ spool of 8 gauge wire. There are NO splices along the line and it terminates in a 30 amp plug that feeds the industrial surge protector for equipment in the entertainment center and two hospital grade outlets just outside the center. (Again, all a continuous run without splices.)
The "power consumers" in the center include a Yamaha RX-Z9 Receiver (1,200 watts rated input), a Crown PSA-2XH (eXtended Headroom), bridged, making about 800 watts into a 12 ohm load (20 amp rated input), and a Sunfire Signature sub (2,500 watt disclamer)
The line got it’s own 20 amp breaker, and I even put a big ferrite bead on the line.
The Yamaha SACD became less grainy, but I didn’t really notice any audible difference in the Oppo95, which uses a better power supply.