As for Fremer’s audio room power system:
A lot of audiophiles use a sub panel to feed their audio equipment. I would guess in most cases the sub panel is wired 120/240V. I would also guess that most audiophiles, not all, feed all there equipment, that is connected together by wire interconnects, to branch circuit breakers fed from only 1 Line. All from Line 1 or all from Line 2. Not from both. No different than if multiple 120V dedicated branch circuits were ran from the main electrical panel.
FWIW in Fermer’s case, I doubt if the total used listening audio equipment continuous FLA equaled more than 12 amps tops.
Other things found in a home that can draw 12A at 120V continuous:
Portable plug in Vacuum cleaner.
Central Vac system.
1500 watt 120V plug in electric space heater.
120V window A/C unit.
Above counter plug in toaster oven.
Some hair dryers. We have a 1875W hair dryer. FLA 15.63A.
I’m sure there are other 120V devices, appliances, equipment, that could be added to the list.
/ / / /
Any of you guys watch this interview video of Caelin Gabriel CEO of Shunyata?
Where does most of the noise come from on an audio system? The circuit designer,(maybe not all), dump’s it on the chassis of the equipment. Makes sense to me...🤔