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.