The team of amp designer Bill Hughes and Roger Cox—with input from Bob Rufkahr and Dan Armstrong—set about to create what Cox referred to as “the biggest, nastiest bass amplifier the world had ever seen.” Using the same sort of madness that drove Dr. Frankenstein, the team came up with a 300-watt all-tube phantasmagoria they called the Super Vacuum Tube—or SVT, to save on vowels. To fully grasp the monstrosity of their creation, the SVT's 300-watt output stomped the deafening 200-watt Marshall Major by a full 100-watts!