Wanting know honest opinions, with pairing the two brands, As to having heard a couple of people say. They would go with the same brand preamp. Would like to hear from bassist who now are using Bart, pickups and the OBP-3 preamp instead of the Bartolini preamp w/Bartolini pickups. Also add opinions on 9v or 18v wiring. Tech hasn't finished my work yet, but I'm having a Bartolini pickup set paired with Aguilar OBP-3 preamp done in one of my basses now. Just don't know what to expect once work is done. Looking for Pros, and Cons.