Depends on what I'm playing. I mostly use one of the following: neck full on and bridge off, both full on, and neck full on with the bridge rolled back slightly.
BUT in addition to differences in what people want, the relative heights and strengths of the pups affects what you get from the vol knob changes.
Since all of my J's have a series/parallel mod and only one vol control works in the series mode, I adjust the relative pup heights to give me a nice thumpy P kinda tone in series. When I do that, the settings above (in regular parallel mode) do the following:
neck alone - nice jazzy warm almost acoustic tone
both full on - a little more thumpy than the neck and less round, sounds kinda neutral
Neck full, bridge rolled back a bit - there's a point where the tone gets a little scoopy, lots of character!
BUT in addition to differences in what people want, the relative heights and strengths of the pups affects what you get from the vol knob changes.
Since all of my J's have a series/parallel mod and only one vol control works in the series mode, I adjust the relative pup heights to give me a nice thumpy P kinda tone in series. When I do that, the settings above (in regular parallel mode) do the following:
neck alone - nice jazzy warm almost acoustic tone
both full on - a little more thumpy than the neck and less round, sounds kinda neutral
Neck full, bridge rolled back a bit - there's a point where the tone gets a little scoopy, lots of character!