i don't know but i really dig his sound on this tour.
he's prob using some plexis and a lot more goodies, and his sound is just amazing.
Richard said in an Email that Robin uses JCM 2000s
There's a possability those aren't in the original form, a lot of guitarists modify their equipment. Slash for example had his Les Pauls made buy a custom guitar artist, the only real Gibson guitars that he uses are three Les Pauls that Gibson made for him, which he doesn't even use to record with, he only uses them for live work...