How can I make my P bass sound like a jazz bass without having to buy a jazz bass. If this helps I have a boss geb-7, mxr m-80, and a fender rumble 100. thanks in advance.
I'm really dont think its possible. You can add a jazz bass pickup in the bridge position, but it still one sound exact and it's risky doing something like that unless its professionally done.
Even though you did say, "without buying a jazz bass", it's hard to do it without the jazz. The high notes, especially, sound completely different. You could try a Standard Jazz bass, those can be had for under $500
Not so sure about that... I think the jazz w/ S-1 cops a good P tone, but not the other way around (IME anyway)
Slap a Jazz pickup at the bridge and put a Jazz neck on it. The money it will cost you to do that, you could just go buy a Jazz bass. A Precision is a Precision and a Jazz is a Jazz. You can't make one sound like the other. Manufacturers have been trying for years and they still can't get it. Only G&L did and thats because Leo Fender started G&L. But even those aren't exact. Hey, rondomusic.net has Jazz basses for $99.00, $109.00, and $139.00. It will satisfy your Jazz Itch and wont break the bank.
Well, sort of, and I was going to suggest installing a series/parallel switch like the S-1 for the P pickup, and installing a true J pickup at the bridge. That's about as close to a J as you could get while retaining the P pickup -- but it still won't sound just like a J. I guess the Stu Hamm sig approach could work too, but I don't know whether the pickup spacing of the J and P pickups replicates their spacing on J and P basses. If not, that won't do the trick, but it is pretty cool. Maybe even cooler if the P pickup and J pickups were wired to separate jacks for stereo output.