Dozin wrote:Jerry's blackface was a backup
The ubiquitous "two Twin chassis-in-one Twin combo cabinet" preamp unit made its first appearance at the Day On The Green, Oakland 10/9/76
SF as the primary and the BF as secondary or backup has for years been the popular theory,(which I am not disputing), however lately I've been noticing more and more stage pics from 70's/80's-era shows where he's plugged into the BF head. Yeah, I know I used to post and date every little observation I made... I've fallen off my game. Anyway, he seems to have gone to his backup head fairly frequently... which seems a little odd to me, considering how little there is to fail when you cut the Twin's power section out of the equation.
Just for the sake of argument though
) they were just slightly different flavors, one with slightly "darker" tubes than the other? Just a random notion worth debunking imho.