i saw a bass which had kind of like active pickups, but when you pull the volume knob it changed to passive pickups. i think this is possible on guitar, what do i need to make a guitar like that??
Could be passive pickups with a seperate preamp in the bass. You turn the amp on or off with the switch. I think the new epiphone actives are supposed to be switchable. Most actives like EMG they are active or dont work.