 By 1972, the Standel brand was replaced by SG Amplifiers (which reputedly stood for "Standel Gibson") manufactured in the Standel factory at 4918 Santa Anita Ave., El Monte, California, as the SG Systems brand (often miscalled "SG System").The SG line consisted of "hybrid" designs (solid-state preamp, tube power amp) for guitar and bass amplification and "all-transistor" amplifiers (self-powered monitors and powered mixers).The amplifiers were most likely developed using Standel resources in coalition with Randall's head design engineer Gary Sunda.