Originally Posted by King0424
I just purchased a passive pj bass. Is it possible to make it active? If so is it difficult? I also thought about making it a string through, is this possible as well??
It is possible, and not super difficult to convert a passive to an active.
Buy a preamp, connect your pups to it, place your pots, connect it to the output jack, add a battery compartment. You'll need to check if you have room for a battery compartment however. There are certainly guides available on the internet.
As for making it a string-thru, I don't recommend doing so. It doesn't really present any huge advantages and is a much more involved project than converting electronics.
EDIT: Line6man, an active bass means the opportunity to shape tone with a bass/mid/treble style preamp, among some advantages.