When attempting to find an answer to the "quality" of sound one attains from various audio cables, most of the research leads to the very subjective answers of audio/sound engineers. I was hoping to gain some insight from a physics/engineering perspective. I'm curious if an expensive or "professional" cable is somehow more capable of reducing interference noise, or conveying the transduced signal from a microphone more faithfully than an inexpensive cable. My suspicion is that there would be exactly no difference between, say, a $10 dollar 20' cable and a $100 20' cable simply because, in both cases, the same type of circuit is employed to convey two relatively inverted signals, and thus eliminate RF interference through phase cancellation. Of course, more expensive cables are more durable/rugged, but I am finding very little satisfying arguments that suggest that two cables will sound differently. I'll leave the question intentionally vague for now in the hopes that other considerations will be brought into the discussion. Thanks in advance for any responses!!!