I just finished rewiring my father in-law's fender jazz. Each pickup soloed sounds really great, but when both are 100% the volume drops about 30% and the mids and lows are cut as well. Is this normal? When I put a Seymour Duncan Quarter Pound Jazz set in my Essex Jazz I didn't have this problem. In fact Both pickups 100% just made it sound better, and that has been my experience with my other basses as well. Any input would be great.