All my basses have had 2 double coil pups on them (w/ active electronics). They have punch and definition with plentiful bottom end, heavy without being too muddy, and I have achieved great stage sound with these basses. I would however like to clean up the mud a bit more. What kind of sound characteristics would I get from a bass with a single coil at the bridge and a split coil at the neck? Better definition? Would I be losing some of that bottom end? Or do they just give a bright jazzy tone? General application will be extreme metal (and yes it does matter, people actually do hear me on stage).