Saw the Manchester gig last night. They were awesome! The guy on the door advised we take the ear plugs as he reckoned it was 140db, which I can quite believe, it was loud as fuck and they cranked it up a bit every couple of tracks. The last song - Feed Me With Your Kiss - was a bit too much. They might as well have just set off a jet engine on stage for the last 25 minutes. It didn't even go back into the song, literally 25 minutes of insane volume throbbing feedback and then they went off. I was holding my hands up in surrender long before it finished.
I remember back in the early 90s they were talking about volume levels and frequencies that would cause palpitations and stuff - everyone I was with felt a bit weird after the gig. I imagine they play that on a loop in Guantanamo Bay.