I've seen many bands live and can safely say Ac/Dc are the greatest live band ever. They sound so good live, better than the studio recordings. I can't think why they would edit the sound other than to clean up some unwanted noise from third parties.

One of the times I saw Pantera was the greatest gig i've been to as phil performed well but usually phil was doped up or pissed so ruined the perfomance, Dime is always top bollox tho.

edit: oh yeah, they've been playing live 30 yrs now dude. Their debut album was released in 74 in oz and they'd gigged b4 that.