I did have an interconnect from my old receiver to my old sub, the total outside diameter was about 1/8", I'm guessing the center conductor couldn't have been more than a few strands. Anyway, replacing it with a $20 cable made a world of difference.
Yeah, the interconnects made SOME difference in general. Certainly my Better Cables subwoofer cable made a big difference. I am certainly skeptical that a better interconnect would improve the VP-160 THAT much. Like some of you have said, it is just very unlikely. But, I don't know.