Figured you's dig this shot of Neil Young, circa 1973. How many of those Fenders do you think he daisy chained together for that gig? I see a mic in front of each of the Twins. Even if ran his guitart through just those two amps, Neil's stage volume would be deafening. (80 watts per amp? 100 watts per amp?)
Smart move to set those Twins up well below ear level! :-) IIRC Stepehn Stills occassinally played a Flying V in the early 70's. This photo is the first one I've seen of Neil with one though.
