I posted this also in pickups, but I think it might be better answered here... I hope. If the double post is a problem, I will delete one. I have a bass with a preamp which I would like to fiddle with. It is a large circuit type (as in not surface mount) that had easily identified components. Now, the things I would like to accomplish are changing the general tone structure of the pre, and make the bass sound more lively. I know this will be a complicated venture, but I am willing to undertake it. There's a reason I am going back to school for an EE degree. I love electronic fiddling.