Angus Young’s Schaffer-Vega Diversity System

The only “effect” Angus Young has ever incorporated into his signal chain is the Schaffer-Vega Diversity System (SVDS)—a wireless unit he began using in 1977 for both live performances and studio recordings.

The Schaffer-Vega Diversity System

The SVDS isn’t just a basic wireless receiver. What sets it apart is its built-in volume boost control, which can further overdrive the guitar signal. Angus utilized this feature extensively, adding a unique edge to his tone. This aspect of his sound remained largely unknown to fans and players until Fil Olivieri’s groundbreaking research brought it to light.

SoloDallas Discovery

Everything we now know about the SVDS and its influence on Angus’s sound comes from Fil Olivieri of SoloDallas. Rather than simply summarizing his findings here, I encourage you to visit his website at SoloDallas.com to read the full story. Fil’s deep dive into the SVDS is a fascinating exploration of how this seemingly simple unit became a key ingredient in Angus’s legendary tone.

Fil’s research didn’t stop at uncovering the SVDS’s secrets. It also led to the development of the Schaffer Vega Replica and the SoloDallas Storm pedal—a standalone pedal that replicates the SVDS’s signature sound. Both products are available on his website for those looking to channel Angus’s iconic tone.