AS-1 Sustainer
The Roland AS-1 Sustainer is a vintage guitar effects pedal released in the early 1970s, marking one of the Roland Corporation's first forays into the effects market before the establishment of the Boss brand. This analog pedal combines optical compression with a hint of transistor distortion to provide a smooth, singing sustain and a unique tonal bite. Known for its ability to bring hammer-ons and subtle ornaments to the forefront, it flattens dynamics to help lead guitar tones cut through a band mix. Housed in a large, durable cast-metal enclosure, the AS-1 is an 18V device that traditionally requires two 9V batteries to operate. Its circuit design is famously simple, featuring a single "Sustain" knob and a "Volume" control. Despite its vintage flaws, such as a lack of DC power jacks or LEDs, it remains a "holy grail" for collectors and adventurous musicians seeking organic, old-school compression and harmonic feedback.
