These two excellent photos are in the booklet to the 2CD Sun Records 50th Anniversary set:
First of all, note the stack of Audiotape boxes on the mixing console. Also note that the console
appears to be a stock RCA or Collins radio-studio board. And note the Ampex 350 remote on top of the
console. In the photo with Jerry Lee Lewis, note the Ampex 350 rack-mounted in the background. Lots
of hits made with that setup!
-- Tom Fine