I've been gigging with a classic rock cover band using my bonestock AmStd Precision through a Peavey 450 Max head and an Avatar B212 cabinet. I've got things set to where I can get the sound I want at my required volume. As I indicated in another thread, however, I just won a contest and the prize is a new bass. In contrast to my passive one-pickup P, this new one is active and has a J-pup in the neck and a MM-style at the bridge. Since I haven't received it yet I don't know how its tone will compare with my old standby, but I thought I'd begin to glean some suggestions from you guys who play more than one bass through a single amp/cab setup. My initial assumption, based on style and body materials, is that the new bass will more aggressive and probably more scooped. I foresee this as being a problem, as my current amp settings are tailored for my warm, mellow and mid-heavy Precision. Will I have to change all my amp settings every time I change basses onstage? How do you manage multiple basses through a single rig?