For over three decades, Fil “SoloDallas” Olivieri chased the elusive tone heard on AC/DC’s Back in Black—a sound so raw, powerful, and expressive that it shaped the blueprint for hard rock guitar. Fil meticulously recreated Angus’s gear chain, but something was always missing.

Jim James, the frontman and guitarist of My Morning Jacket, has long been celebrated for his innovative and eclectic guitar tones. In the creation of the band's recent album, "Is", James expanded his tonal palette by incorporating the SoloDallas Schaffer Boost into his effects lineup.