54,000 watts, 105dB at 1 mile, California Jam PA

[Ritchie200]

I've read this a couple of times and it disappeared from the net.  It's back and the details of this are amazing.  Tycobrahe Sound came up with some very innovative techniques (for 1974) to make this come together for the California Jam.  Just an amazing read for amp geeks like us!  Bass reproduction pulled line voltage down to 90v!  Ground loops!  Spare parts van!  Cool stuff!  Plus, this concert included some of the best performances of ELP, Black Sabbath, and Deep Purple.  There was another no-name band way down the bill called....hmmm....what was it...Eagles, yeah, that's it.
Jim

http://www.prosoundweb.com/article/history_files_tycobrahe_sound_company_and_the_california_jam/