Gee Whiz?

Impedance, Inductance and capacitance have a dramatic and direct effect on any type or kind of power or operational amplifiers function, and is a major point in the development of just about all components that use any form of amp. The small wires contained inside your amp do not pose any real threat to performance as they are only a couple inches long and further are well shielded by the components chassis.

Further, oxidation happens faster and more often on the crappy cables! The rest is obvious and moot.

I don’t know what your friend’s background really is, but I would venture a guess he works for Bose.