Ok...this has been bugging me. Robert "Kool" Bell has a tone that just makes me...well...you know! I know he currently uses a Zon Sonus and Rotosound strings with more modern sounding amps such as Eden and SWR...but it's to my knowledge that he didn't use this equipment back in the 70s because wasn't the Sonus only introduced a little over a decade ago? The Zon website introduces the Sonus as the jazz bass of the 1990's, which supports my belief. Anyways..."Take My Heart" is a good track to listen to because I feel it allows his tone to stand out very well (although he stands out in all the tracks). To my ears his tone sounds a little thick for a jazz bass, so I'm guessing possibly a p-bass through what sounds like an Ampeg since he gets some good grunt. Yet his slap tone sounds like my Stingray5 with the switch in the series position. Any opinions out there? I'd love to add this sound to my arsenal somehow!