In the late 70s, the Schaffer-Vega Diversity System (SVDS) wireless system revolutionized rock ‘n roll staging. Less known is the fact that many SVDS users took their units into the studio with them and recorded with it. The Schaffer-Vega system introduced a new twist to a process called “companding.” David Gilmour, Angus Young and scores of others used the SVDS’ proprietary processing and companding to shape their sounds and create their unmistakable tonal signatures. Selected as Guitar Player magazines 2015 Editors Pick, "You will be entranced by what it does to your guitar sound.... Call it some kind of magic box.... I just hide it behind the amp and let guitarists in the audience marvel..."