Do power cables make a difference to sound quality?

No. Next.<p>Ok. Hum. So, ferrite, and proper grounded lines but the hum was a problem not the cables.

Nope.<p>The speakers and your ears are far more non-linear than any difference caused by changes of power cables.<p>&quot;A fool and his money are soon parted.&quot; is an old proverb well worth keeping in mind.