you can read all about the preamp in
this thread.
This is the 1 pickup, 3 knob version. You can use it for 2 pickups but you'll need to grab another pot I believe (i'm told Best Bass Gear is a good source).
Doesn't look like it was ever installed. I never got around to installing it, I'm into passive stuff and bought this to experiment but I don't really have the time, somebody else could probably use this more than I can.
$215 shipped. I am not interested in any trades.