Chandler Limited Little Devil Compressor, FET Compressor 500 Module using concepts from Chandler Germanium Comp and 2264 Comp, Input Control Curve selection with zener and germanium diode knees, mix control, ratio in three positions, attack, sidechain filter (-30, 60, 90, 150, 300Hz), THD selection, release, hardwire bypass, Format: API Series 500 Rack