For this “small” AC/DC show (normally the band packs stadiums, this was shot at Atlanta's State Farm Arena), Angus Young was using nine 100-watt Super Lead Marshall Amplification heads. About four or five years ago the amps were modded with a master volume control to get a bit more preamp gain. The band tours with Simon Murton, a full-time amp tech, who spends every day in his workshop swapping tubes and doing maintenance because they push the heads so hot that they generally only play three to
