An older version of the Rockman Guitar Ace designed by legendary guitarist and studio pioneer, Tom Schultz of Boston. 

Super straightforward headphone amp with two channels: clean and distortion, with the option for more distortion. Notably these saw some serious studio use, mainly on Def Leppards 'Hysteria' in which one of these was responsible for the primary guitar sound. Put on some headphones, plug in, and you'll soon be capturing the tone of those legendary Boston tracks. This particular example has been re-capped at some stage, however works perfectly and is ready for some serious studio usage.