Hi. I have an Ibanez SR1000 bass with this Bartolini pickup + active preamp system. When I opened it up today I found that the pickups are actually passive, and it's only the preamp that's active. So I got the idea of making an active / passive switch where in one possition the preamp is bypassed. This can be done fairly easy. But I don't know how well it would work soundwise. Does anyone have experience with similar mods? Thanks.