I hate the quack sound. I have a Kiesel Delos 7 with a passive Beryllium Neck and Bridge. I Like the PAF qualities of the Beryllium Neck and the bass response of it isn't too heavy so it can stay for now. The bridge has some quack to it and I don't know if it's something in the controls that can be changed to eliminate the quack; and by the I mean something like a capacitor. But if I wanted to do more leads in the bridge position, which I currently don't do, would a Seymour Duncan Full Shred or a Dimarzio PAF do this for me? No price restrictions are to be had on this... let's spend my tax returns on some gear!!!