Looks like a JMP.
-2008 Gibson Les Paul Studio Cherry Sunburst w/ Alnico Pro II
-Marshall JCM2000 DSL 401
-Fender Hot Rod Deluxe
-Blackstar HT-1 mini stack
I can't tell in that vid, but Malcolm uses some custom amps on tour a lot. This vid is probably too old for that though. But generally, he (and Angus for that matter) uses JTM45s.

However, I believe he also put to use an old Marshall Superbass - could be one of those.

EDIT: Actually, no, got a better look - those just look like JMPs.
Last edited by Flying Couch at Oct 18, 2009,