My '72 Jazz had a strip of foam rubber (looked like weatherstripping) glued to the underside of the bridge cover. I wasn't crazy about the tone, so I removed it. I think it works better on a P-Bass than a Jazz.
Anyway, it's easy enough to mute with the side I your hand and pluck with your thumb if you're looking for that thunky sound.
Last edited by LanEvo : 10-13-2013 at 12:29 PM.