Comparing tires to speaker wire is a wonderfully misplaced analogy.
One more time:
Inductance.
Capacitance.
Resistance.
Which of those 3 properties does "wonder wire" improve on?
My large rig is well over $15K, I run Carol Cable Low Voltage Landscape Lighting Wire, 12AWG 65/30 wire (zip cord to the unwashed). I have been hounded, pestered, and generally nagged by my local audio boutique about my steadfast refusal to pour money into their pockets regarding the purchase of SuperDuper-Extremo Magic Wire.
In point of fact, they (Audio Advice, Raleigh NC) have sent home with me all sorts of exotic cabling because they are convinced that once I "hear" what said sacred copper does to/for my system, I will experience something akin to what happened to Saul upon the road to Damascus (look it up).
Nothing. Nada. There is ZERO magic in a cable. Copper wire of sufficient diameter and strand count is COPPER WIRE OF SUFFICIENT DIAMETER AND STRAND COUNT.
If you run into a wire that actually alters the audio output, you have a FILTER.
If some of you want to spend your money on this stuff (and you do), feel free. But like an addiction to pr0n or crack or Mountain Dew, please keep this information unto yourself.
Thank you.