I just purchased a used Brice 5-string fretless. I'm really impressed! However, I need to do some electronics repairs and mod(s). First, the bass came with volume, volume, blend, and tone controls, which is pretty weird. I've always preferred V-B-T over V-V-T, but I could definitely be convinced to try a different configuration since I have four knobs to play with. Maybe V-V-T plus master volume? Or else two tone controls with different cap values?
Anyway, here's the current status of the bass. The pots were scratchy when the bass arrived, the blend knob is wired backwards, and the tone control was very loose and wiggly. I damaged a couple of pots while trying to remove the knobs for cleaning (I did use a rag to apply even pressure, but they were wedged on really tight), so I am planning on replacing all of the pots. The pickups are active (humbuckers?) with passive tone controls, which is new to me. I know that passive basses typically use 250K or 500K pots, and basses with active pre-amps use much lower values, so which do I use here? Can I just treat the pickups like any other passive bass? The battery is wired between the jack and the pickups, so I don't need to mess with it in order to replace the pots. One more thing that is weird to me: the bridge pickup volume uses an A25K pot, whereas both the neck pickup and the tone control use B100K pots. Not sure why this is. Did someone previously replace the bridge pickup pot?
I am not looking to replace the pickups or to put in an expensive pre-amp, at least not just yet. I would consider a pre-amp if I can find something pretty affordable, say under $50. Simple active bass and treble controls might be nice.... I don't think there is room in the cavity for another battery, though, so anything active would need to use the same battery. Speaking of the battery, this one is locked up with four screws, so that is one more thing I'd like to address at some point. One option would be an active/passive switch, but I'm not sure how to install that.
I emailed Rondo to ask for specs and/or a wiring diagram. In the meantime, any other advice, recommendations, or information will be greatly appreciated.
This wiring you have described is VERY unusual. What model Brice is this!?