I don't know, but if you're going after his tone, the last (well, not really but certainly not the first) thing you should look at are his speakers.

He uses a $3000 amp.

EDIT: If I had to guess I'd say Celestion V30
He uses Two Rock amplifiers and Victoria replica's.
Gibson Les Paul Studio
Fender American Standard Stratocaster Sunburst
Line 6 Pod XT Live
Randall G3 Series 75w Amplifier
and Myself
lets just say i just bought a fender twin head in a pawn shop for $600 yestarday and was sooooooo influenced by the tone it produced, im looking for speakers to compliment it.