i want to get new emg pickups for my delux fender jazz and was wondering if i can just install these or am i gona have to rewire everything.
Your bass has five knobs because it has an active preamp. Did your EMG's come with a passive volume/volume/tone setup? If it did, there would just be a set of three potentiomenters (pots) with knobs on the end, and no circuitry or extra wires. Or, you might have a stacked bass/treble circuit, or some such thing. Can you be a bit more descriptive about the knobs that came with your pikups? Possibly post a picture? Basically, did your pickups come with a preamp? That being said, I would take your bass to a qualified technician to have your pickups swapped out.
Here's what is going on. He wants to put an EMG J set in a deluxe jazz. He will have to do some wiring to hook up the EMGs to the 9 volt power, and then he'll have to hook up the signal wires as well. Judging by the lingo that has been used here, it is best for a technician to do the work. The wiring that comes with the pickups is the 25k pots set up in a vol/vol/tone arrangement, and prewired for easier installation. But, unless he was removing the preamp, he will not need to use them. Oh, and when you do replace them, I want the old pickups!