Hi everyone. I posted this thread a few months ago in the Misc Forum & I'm still no closer to a comclusion then when I started. ORIGINAL POST I need help w/my OBP-1. I emailed Aguilar about it & I'm gonna ask you guys also. If any of you guys could help, I'd be VERY GRATEFUL!!!!!! END OF ORIGINAL POST You could see the entire thread by CLICKING HERE Update: I've got in touch w/PJ @ Aguilar & he got me in touch w/manager (forgot his name) & he told me that they had no problem w/other companies (Lull, Lakland, etc) adding the OBP-1 w/passive pickups. I've changed the pickups in the Wamoth Jazz from Sadowsky humcanceling to EMG's & I've put the Sadowsky pickups in the Essex & left it passive. I've also Built a Warmoth Gecko bass & used the OBP-1 w/Seymour Duncan ASB2-5 active pickups w/no problems.