For those of you who are handy with a soldering iron... Last weekend I replaced the onboard pre in one of my favorite basses. Out with the old (EMG BTS), in with the new (Aguilar OBP-1)! I have another bass with the OBP-1 but it has single-coil passive pups-- this one has active EMG's. The verdict: Is it possible to have too much growl? The thing is amazing! I've always loved the OBP-1 and band mates told me that the bass with the Aggie had a stronger, heavier tone, so I thought I'd give it a try with the EMG pup's. Has anyone else tried this combination or something similar? What were your results like?