Incidently, the loudest rock concert ever recorded was The Who at Charlton Athletic Football Ground on 31st May 1976 (previous to that was Deep Purple). They used a 76,000 watt PA and sound levels were indeed recorded as high as 120dB. Pete Townshend is of course well acquainted with tinnitis (permanent ringing in the ears).

G91A, DSP5000.3, Explorer