Produced from 1976 - 1984 with original box & becoming very difficult to find. Featuring vintage big-box design, a three-jack layout and streamlined controls for delay, mix, and regen, the MXR Analog Delay is one of the godfathers of warm, organic echo and decay. The original effect which MXR's Carbon Copy schematic was based on, this effect gives waves of undulating decay perfect for shoegaze, dreampop, and new wave.