Thin speaker cable

van den hul makes a superb thin cable....its used in a lot of studios. its very inexpensive compared to most

Three excellent super thin cables to try would be the Speltz Anti-cables at about $60 a pair, the Audience Au24's at about $700 a pair, and the Audio Teknes at about $1300 a pair.

The Teknes are the best I've heard, but the Anti-cables are quite possibly the best in the world if price is part of the equation.

-IMO

I'm using Guerilla Audio's thin silver in my system. It is a marked improvement from Signal Cables Ultra Bi Wire and the Speltz Anti's I have used before

Good Luck
Cheers
Vernon

Interesting experiment-CAT-5. Cheap as heck ultra-thin wire. The mid-range will leap out at you even if the bass does go the way of the Dodo. Never compared it to expensive ultra-thin wire but can only assume similar results.

There is absolutely no correlation between thin wire and its' ability to provide low frequency response. Ignore that tidbit.