Perhaps, I'm just being too picky, but I've searched through a number of discussions about various onboard preamp characteristics, but have yet to find one that addresses an issue I've had with many of them. I am currently playing a Tobias with a stock Bartolini setup that displays the issue. The wiring is configured so that the toggle switch turns the 3 band EQ on and off. With the preamp switched off, the Bart pups have a very nice tone and seem to be very even; lots of upper harmonic structure and low mid growl etc. However, when the EQ is switched into the circuit, there seems to be no "flat" setting which preserves the original sound of the pups. Furthermore, I can not find a single setting which approaches flat. The engaged preamp seems to compress the nice tone from the pups and lose a lot of desireable qualities which can not be recovered with any setting. The only active circuits I've used that do not sound this way to my ears are the Alembic Series, and perhaps the F Bass and the Stingray. Every other active bass I've played seems to have this issue. I really like this particular Tobias for it's acoustic and playing qualities. So, I generally get by with the active preamp disengaged, and get tonal variation with the passive sweep pot. My objective is to replace the preamp with something that would provide a decent "flat" response, but offer some tonal modification from there. Is such an onboard preamp commercially available? If not, is it possible to just put in some kind of passive tone controls that wouldn't kill the flat signal? I'm perfectly happy doing amplification off board. Thanks for reading.