As far as I can tell, both Robben and Larry plays Dumbles here
I believe, I have seen this clip in a better video quality, but it is not easy to find.
I just read through that entire thread - All the name calling and ego polishing aside - there is some impressive and interesting knowledge dropped there.Great, isn't it? "Fragile harmonics" ... "surviving electrons" ...
For amusement, check this thread with outspoken opinions about Dumble amps:
It's not just The Gear Page where emotions sometimes take the lead.
I didn't put quotes from that thread in the OP on purpose, but it's a good read.
Regarding Larry I can't see in the <10 min I just watched if he is using his Dumble at this show or if it's one of his Bludotone amps.
This show is from 2012 and I know that he played at least some shows in 2011 with a Bludotone.
Shouldn't you be able to hear it? sorry I just don't buy into the whole Dumble cork sniffery.