Ok I give up searching... I have 2 Lane Poor pickups in my old Yamaha TRB and with the stock preamp they don't sound overly good, which is why I am currently in the process of replacing the preamp. I have decided to go with something simple, that is, I decided on the Aguilar OBP-1. 2 bands, boost only, sweet simplicity. The only problem I am having is how to determine the values of the volume and blend pots. I know the impedances of both pickups, so where do I go from here?