As for Mythbusters, I just don't know how they could test it objectively.
Not all of their myths tests are 100% objective. See the recent segments involving the blind-man-driving-while-a-drunk-jamie-instructs and the "Beer Goggles", where they rated the attractiveness of people at different levels of intoxication. These were based on subjective responses.
In such a speaker-wire/amps-matter myth episode, they could test the physical properties of the sound to see if there's any difference using various methods. Then they could do a series of psychological tests with random subjects to see if they can skew the results on sets of identical wires/amps by telling folks that one set cost $X and the other $X,XXX, or by seeing which set people prefer.
I agree that it wouldn't appeal to everyone, but it sure would to a lot of us around here!
And heck, the way they *always* make a point of asking for suggestions, I'd think that eventually they'll get around to doing it.
