Ran across this on the seymour duncan website. (look at #644) http://www.seymourduncan.com/support/seymours_q_and_a_12.shtml#644 So those old ricks have a .0047 cap to cut bass on their bridge p/ups, they don't do that on the newer models I guess. Seymour seems to attribute at least part of Chris Squire's sound to it. I like his sound, I don't really want to copy it, but I definitely like it. This raises a few questions: The value of the capacitor is really small how much bass would this cut? This would be considered a highpass filter? Has anyone tried this on a Non-Rickenbacker bass? Seems like it would be an interesting thing to try out on a jazz bass and would be really easy to wire up with a toggle switch.