Best concert I ever saw in my life was Terrible Ted. Legend Valley, 25 years ago.
I had the pleasure of seeing Ted several times during his solo heyday in the 1970's but truly the loudest concert I ever went to, and still feel the after effects to this day, was at the 1979 California World Music Festival, which lasted two days and featured the best 70's rock bands playing over what was, for the then, the largest sound system ever assembled (at the LA Coliseum). When Ted peaked it was so loud the system actually distorted.