Hope you all don't mind me weighing in on this topic...no special aganda. So here goes:
My setup: B&W 802D's, Krell amps, and blah, blah, blah. Monster Sigma speaker cables purchased in 1990, at $800 for an 8' pair.
Jeez, I hate the whole speaker cable debate, but I have found that most expensive speaker cables (arbitrarily > $300 per 8' run) usually act as passive tone controls. I also believe the sonic differences to be VERY real, but in the end not too important unless something bad is going on, such as a truncated top end, or possibly a lack of pitch definition in the bottom 2 octaves.
I really got disgusted playing the tweaking game years ago, so I just kept the sigma cables in place. These comments have me curious enough to revisit the subject, so for the cost of some cheap zip cord, I think I'll give it a try, and send another reply earliest convenience.
All that said, I've read that B&W does in fact use Straight Wire speaker cable in their listening tests. That's not cheap stuff, by any stretch. It also appears to be true that many speaker manufacturers agree that certain cables are more synergistic with their product. Hard to say whether or not there is any REALLY GOOD way to verify any of this nonsense
Finally, the only axe I have to grind in this or any of the AVS forums is with the tweakazoids who continually blast B&W as being "mass market" speakers. I got news for you, there is no such thing as a $12,000 mass market speaker!! So take your esoteric flavor of the month audio snob speakers that won't play beyond 85db (in room) and stuff them where the sun doesn't shine There! I feel much better now.
Industry Insider (Don't ask)