In the US, we have two voltages in (all but really really old)
houses: 120 and 240, although most outlets are 120, the ranges,
clothes dryers and air conditioners are 240. And that 240 is balanced.
If we were SERIOUS audiophiles, we'd have 240 volt four pin dryer
outlets put in our listening rooms and run our power amps on 240.


** Only if we were serious AUDIOPHOOLs - that is.

Home hi-fi installations can suffer from earth loop hum and transformer
radiated hum fields - neither of which is fixed by using "balanced power".



.... Phil