O.k., I play an active bass but I really love the passive tone. I was wondering if there was some way to switch from active to passive. I've heard of preamps that have a switch for both? I have a p pup at my neck and a double jazz at the bridge. I haven't found any double jazz pups (if i have to add new pickups) so will this cause a problem? What's the easiest way to switch from active to passive, or have the best of both worlds, without buying another axe?