Thanks very much Ron.
To complicate matters, in the Letterman video
he playing through a completely different amp/cab combination. Looks like a ss amp head into a 2X15 cab?
Man, I love that tone! If I could get a blending of his tone with Emma Richardson's (Band of Skulls) 'P-bass into Ampeg' "hard rock sledgehammer"
tone, I'd be one happy bass player!