Ritchie Blackmore's Rainbow, maybe 25 years ago. Painfully loud (louder even than Motorhead) in a hall that was basically just a shell - nothing to absorb the sound: it was just bouncing around. Deafening even at the back I knew their songs but it impossible to make out what they were performing. I left out after about 15 minutes.


I heard of a Thin lizzy concert in Australia where they struck the opening chord, stage pyrotechnics went off - and so did the sound. They coulcn't fix it. End of show!