anyone here have any luck using basses that have active electronics with vintage amps that don't have the inputs to handle the higher signals? i've got an old (~72-75) SVT and it is breaking up too much with my musicman sterling. it sounds fine with a passive fender jazz bass. any thoughts on how i can get these two pieces of equipment to work well together? i feel like the bass looses some punch if i turn the volume down too much.