I thought I might see more arguments going the other way. For example, Peter Aczel's article, "The Ten Biggest Lies in Audio" --
"...The lie is that high-priced speaker cables and interconnects sound better than the standard, run-of-the-mill (say, Radio Shack) ones. It is a lie that has been exposed, shamed and refuted over and over again by every genuine authority under the sun, but the tweako audio cultists hate authority and the innocents can't distinguish it from self-serving charlatanry.
The simple truth is that resistance, inductance, and capacitance (R, L, and C) are the only cable parameters that affect performance in the range below radio frequencies. The signal has no idea whether it is being transmitted through cheap or expensive RLC. Yes, you have to pay a little more than rock bottom for decent plugs, shielding, insulation, etc., to avoid reliability problems, and you have to pay attention to resistance in longer connections. In basic electrical performance, however, a nice pair of straightened out wire coat hangers with the ends scraped is not a whit inferior to a $2,000 gee-whiz miracle cable. Nor is 16-gauge lamp cord at 18 cents a foot. Ultrahigh-priced cables are the biggest scam in consumer electronics, and the cowardly surrender of nearly all audio publications to the pressures of the cable marketers is truly depressing to behold."
Sander Sasson -- "Although there’s some truth to buying good quality cables cables of sufficient gauge instead of hooking all your loudspeakers up with telephone cable, that’s about as much as there is to it. The simple truth is that resistance (R), capacitance (C), and inductance (L) per foot and the length of cable used are the only parameters that have any effect in the audible spectrum, 20Hz to 20KHz, for which these cables are used. Other parameters that could affect the signal as it propagates through the cable, such as the often mentioned skin-effect, only come into effect at frequencies several magnitudes above this range, hence have no effect at all. The capacitance and inductance of generic speaker cables is neglectable, so only resistance will play a role. Therefore a good rule of thumb is that for runs up to 10-feet a 2x1.5mm^2 cable will do just fine, up to 50-feet 2x2.5mm^2 is sufficient, and for longer runs 2x4.0mm^2 is required."
On the other hand, I've heard arguments about euphonic distortion....
