The Yamaha GSA-1 is an active single coil pickup that is a Yamaha Power Focus Active Pickup. It features an internal low-noise preamplifier with low-impedance output. This single coil also features active hum cancellation for clean single-coil sound. The 1988 Yamaha Catalog mentions the wider tonal range that carries through long cables and effect chains without losing hights. "There's plenty of reserve power for great sustain sounds, with minimal string pull."
