Just thought I'd share this as people often ask how to set and use the Sadowsky preamp. This is in no way a definitive way to use the onboard preamp, but it's how I use it and how I explain to people how to use it in the showroom as a starting point to getting whatever sound they are looking for.
I was just emailing this to someone and thought I'd share it here on TB as a starting point for more talk on how you use and set your preamp. I'd love to hear how other people think about it using it:
First: our preamp is not the same as the cut/boost preamps you may be familiar with in other active basses. It is boost only. So, while the controls for your other actives may need to sit at noon for a flat sound, ours need to be completely turned down to get an off/flat sound. When I'm showing someone how to use the pre, that's how I begin, with the bass/treble turned all the way down.
Here's how I start using the preamp:
1) I start by raising the active bass a little bit—just so that the sound is full but not boomy (this changes depending on the room and the amp). Then I raise the treble slightly higher than the bass to give the sound some more presence. People sometimes complain that the preamp gets too noisy when you raise the treble all the way. Yes it does, so don't do that.

Again, this is how I do it... some raise their bass and treble way higher than I ever would, but that works for them.
2) Once I have the active preamp bass/treble set, I DO NOT like to crank the passive/VTC tone all the way as I do on my passive basses. The passive tone knob is very useful for fine tuning once you have your preamp bass/treble set. Crank it and you have no room to go. If you put it all the way back, you get a dubby tone, at 9/10 you get a more vintage tone, at noon many here on TB perceive that you add mids to your tone, crank it higher and you get more of a hifi tone.
3) Once I've got all that set, I use the pickup pan as a further tone control to zero in on exactly how I want to sit in the mix for a particular song or session. I don't think of it as selecting pickups, but as selecting a spot in the available spectrum.
That's how I think about it and how I explain things to people in our showroom as a starting point for really understanding how to use our preamp. YMMV, but it will at least get you started.
JR