VT-40

“He now has an Ampeg VT 40 which he links up with a VT 22. He finds that the Ampegs give him the mid-range response he’s looking for, which isn’t the case with, say, the Ritzy, but wallet-piercing Music Man units. On top of that, Rory has a treble and bass booster made by a New Jersey company called Hawk.”March 1979 BEAT Instrumental 

Rory using two linked Ampeg amps on tour in Australia in 1980

“Recently I bought an Ampeg VT 40 and also that one has four 10” speakers. It is possible that I’m going to use that one for a while. It has a good mid-range and the amplifier can be distorted really well when you crank up the volume. That’s about it; I’m still experimenting a bit…That’s why I have that Ampeg, you can accomplish a very natural distortion of the mid-range with that.” June 1978 http://www.roryon.com/mm678-315.html