This Day In Rock History: June 20th
1969, The first of a three day Festival in Newport, California, featuring: Ike And Tina Turner, Marvin Gaye, Creedence Clearwater Revival, The Byrds, The Rascals, Steppenwolf, The Jimi Hendrix Experience, Janis Joplin, Johnny Winter, Eric Burdon and Love. A three day ticket cost $15 (£8.80). Hendrix received $125,000 for his appearance, at the time it was the highest fee ever paid to a rock act for a single appearance.
1974, Van Morrison, The Allman Brothers Band, The Mahavishnu Orchestra, Tim Buckley, The Sensational Alex Harvey Band and The Doobie Brothers all appeared at Knebworth Park, Stevenage, England. A special PA system was used for the event, claiming to be the best ever for an outside show, weighing 12 tons and needing five technicians.
source: thisdayinmusic