I saw a photo of Malcolm with old Mesa Boogie 4x12 stacks with the wire front grills sitting behind him. Did AC/DC in fact use Mesa amps at one time during the early 80's and for how long? It must not have been for very long. AC/DC used Legend amps as well in the early 80's. The screened amps with the lights on top during the For Those About To Rock tour. I was told this by a very trustworthy salesman at Reliable Music in Charlotte back in 1981 as I toted away my Legend 30 Model A. (Possibly Jack)