A nice way to get some great tones without "going active." This baby replaces your tone pot. I never ended up using it (another abandoned project, you know how it goes) so I can't say I have personal experience using one. But there are tons of threads on Talkbass, and probably elsewhere on the web, singing the praises of this little knob.
Here's a link to the Villex PRBT on the Villex website
I'd keep it for another bass, but my laptop melted down last night and I need to repair it. Just in case my warranty doesn't cover it, I'm unloading some extra gear.
One of these babies will cost you almost $100 brand new. I paid $96 after shipping and that was a steal.
I'll let it go for
$77 shipped (lower 48).
