I have a P/J configuration fretless Squier Jaguar and was wondering if I could put the G&L SB-2 Pickups in it?
The MFD P pickup should be a drop-in replacement but the MFD bridge pickup is not a normal J pickup size. So 1/2 yes, 1/2 no
That's right, one will fit, the other won't: {} The overwound MFD bridge pickup is a beast & it's bigger than a Jaguar's bridge pickup.
I also like the DiMarzio Model J -- wired in series it has plenty of output, bucks your hum, and has adjustable poles so you can get the string-to-string balance you want. I haven't matched one with an MFD P but have them in other basses and think it would be a decent match.
I’d also go with Model J to match the MFD... actually, I’d probably use the Model P too, I’d just get a Model PJ set... The original SB bases had Schaller pickups, which are DiMarzio copies...
The Ultra Jazz has more output than the Model J, which is why I suggested it. You'll have a difficult time finding a match for a MFD, output-wise. The MFD is super-hot!
Not sure if you changed your plan but, if you are still planning on routing in active electronics, you could just route in the new pickup as well.
I'm probably going to go for passive electronics! i have plans for expanding the already there active preamp.