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Re:Japanese Audiophiles Install $10k Personal Electricity Ut... by LeoPanthera on Monday August 15, 2016 @11:52PM (#12295421)
It's not completely outlandish to imagine that noisy power could cause noise in the audio output of an amplifier.

I would hope that any good quality amp would filter the incoming power, though.

Re:Japanese Audiophiles Install $10k Personal Electricity Ut... by Johnythree on Tuesday August 16, 2016 @04:08AM (#12296140)
Yes, if it does, it's because of crappy (eg cheap) design. Any amplifier designer should assume that the mains power is very, very noisy.
Re:Japanese Audiophiles Install $10k Personal Electricity Ut... by superuser2 on Monday August 15, 2016 @11:57PM (#12295442)
I'm guessing that good quality amps for the install market are designed to be part of system where these concerns are taken into account.