Since my Jazz pup on my Yamaha is shot I decided to replace it with a new pickup. I don't have a lot of cash to work with, so I ordered a Guitar Jones 5 String BRIDGE Pickup for a Fender Jazz Bass because dimensionally it fits the existing cavity though I'll need to make a new pickup ring for it (no biggee). It has ceramic magnets and large pole pieces that fit my string spacing. Ideal? Won't know until I put it in, but any working pickup in the bridge position will be better than the non-functioning one. I also ordered a Bass Mods 3 Band Active/Passive Bass Preamp with the 4 Controls and Chrome Knobs. None of these, obviously are high end purchases and I'm sure don't compare to something like Bartolini pups or an Aguilar OBP et al, but oh well. I like the sound of my P-Bass pups in the Yamaha, but I'm really wanting more tonal versatility with the new band I'm playing in, and having more control over it on my bass will allow me to change the tone on the fly much easier. I'll have to report back after I mod my bass and add to the mix on the these pups and preamps. I've already read a lot of the reviews and threads on them. Just have to see for myself. If I had unlimited funds I'd just buy different basses, amps and pedals, but for now hopefully this upgrade will get me where I want to go.