Whick one to top loaded jazz bass control cavity?

[villek]

OK i have an top loaded jazz bass body. I have EMG active pick ups on it. Next i assemble preamp in to it. EMG BTC or BTS. I know they both actyally work same way. Only difference is that at another has  done whit 3 and other whit 4 knobs. Only thing i wonder, does 4 knob model BTS fit in to the control cavity, if i put jack out there? There are some electronics under pots. Thanhs alredy.

 

[richship]

If you have a top routed J-Bass with a control plate and a top jack, use the 3 knob (BTC System). If you have a side jack, use the 4 knob (BTS System). With 4, you could even go for the BQC System with mid control. Make sure to pay attention to the Control vs. System to make sure you get what you want (the Controls leave out the volume and blend).

If you are worried about the pot at the end fitting, they use small pots and some of them don't have circuit boards attached so one of them can go there. I'm pretty sure these were designed with Jazz Basses in mind.

I just picked up a BTS for a P-Bass. I don't need the balance pot, but it was cheap.