Electric guitar cable?

george L cables, high end cables for guitars. reportedly used by eric johnson who is as obsessive about tone as audiophiles are about reproduction...he even reportedly can tell between battery types and ages in his stomp boxes.

I and associates have also used with good results:

Canare (brew it yourself...long live soldering parties)
Dimarzio
Monster

Not cable but Wavelength audio makes a 300B based one-speaker guitar amp! List for around 5K. Gotta love it...

JPS Labs and Audience both make guitar cables but I never tried any yet. I gues if I was recoding or play out a lot, I would try one but I am not doing too much of that now.

I use a Tara Labs Decade cable for my bass guitar. Big difference in bass and mid-bass response. Anthony Jackson, one of the best bass guitar players in the world, is as tone obessed as Eric Johnson. He uses a Nordost Quattro Fil cable connected to an FM Acoustics single channel preamp, Krell monoblock, and custom made 3-way speaker cabinet. Audioquest is also making musical instrument cables. Hope this helps.