Guys- I switched out the NTMB-3 in my R-Bass (it is kind of a tone sucking machine if you aren't using Bart PU's) for an OBP-1 wired volume, volume, bass, treble, and passive tone. This is an excellent setup for jazz bass pickups. In my case, I'm using NJ4SE's. The OBP-1 really retains passive sound. The killer is being able to dial in the bridge pickup sound, fatten it up with the bass boost, and attentuate any nastiness with the passive roll off. Anyway, just a FYI. I really like this setup.