Found out some interesting news today...I wrote to Michael Neal of McCune sound. They were the ones that provided the sound equipment for the Candlestick Park concert:
There's been a lot of interest in the Candlestick Park concert. Here's an email i received two years ago:************************************************Hello Mike I found this text on the web... as VP of technology this might be of interest to you as it is to me!
"When The Beatles played their last concert, at San Francisco's Candlestick Park in 1966, the mics were Shure SM56s, the speakers were modified Altec A-7s powered by Altec 1569 80-watt tube amplifiers, and McCune Sound's Mort Feld mixed the show on one or two Altec 1567 five-input rotary pot tube mixers. By modern standards, the sound system was a bare-bones setup-no monitors, no graphic EQs, no delay lines, no dynamics processors and no effects. More noteworthy, from a modern perspective, is the fact that the sound system did not include any equipment made by a UK-based manufacturer, unless you count the Vox guitar amps onstage"
Interesting it states no monitors - yet film and photographs from the concert may suggest otherwise. Hopefully when time permits you will be able to track down Abe - it would be nice to confirm the overall spec but in particular if some form of early monitoring system was used. With Kind Regards
More from Mike:
Unfortunately (to my knowledge) there's only one person still living who was involved in the audio for the show, and that's Abe Jacob. Abe is currently working in New York (for the NYC Opera, I believe), and I did have an email address for him but a hard drive crash seems to have lost it.
There are some photos floating around on the web showing the staging, and the band during the concert, but they're hard to find.
Anyway, sorry I can't be more helpful.
The email states one or two mixers, I assume if he had two it would have looked similar to this...
Im assuming they went with the A7's with the horn inside for stacking purposes, but I haven't looked at Candlestick Park pictures recently, so it could be the other ones, with the horns mounted on top.