Hello,
With all the features about the 50th anniversary of Woodstock I wondered what sort of PA they used.
With a bit of trawling the net I found a few articles:
http://fohonline.com/articles/milest...0-years-after/
https://hometheaterreview.com/how-mc...red-woodstock/
https://www.mcintoshlabs.com/brand/n...odstock-Sound2
The bottom line it was all powered by 20 McIntosh MC3500 350-watt valve amplifiers, although there are couple of lone DC300 in sea of valve amplifiers in one of the pictures, although I couldn’t find reference to it in the articles. Maybe they were used as monitor amplifiers? Also, the they were still new, and their reliability would have been a concern, whereas the McIntosh’s would have been more reliable.
Ps. I did find a thread on The Gear Page site, but I didn't include this link as I felt it wasn't correct "link" etiquette
Terry