The rider that dismayed me was the one that required "no Peavey equipment" in the sound kit. The Peavey power amps were permanently installed in the venue, and it was unlikely that they would be changed out for the one show. After a phone call the performers in the end approved the Peavey amps. I suspect that their issue was based on their experience with Peavey mics and speakers: as proper Celtic ladies, they had no desire to sound like rock 'n' rollers.