Complete Mono Dynamics Manager- VCA compressor with controls for threshold, attack, release, ratio and contour (sidechain filter)- 2 Selectable compressor time constants- Switchable priority mode deactivates the expander when the compressor is working- Feed-forward expander with settings for threshold, attack, release, expand, sidechain high-pass filter and low-pass filter- Switchable external sidechain input- Output stage with adjustable make-up gain and wet/dry mix- Lundahl LL1585 output transformer- Relay-controlled true bypass or off mode in which the signal passes through the sound-colouring circuitry- Construction: API Series 500 format- Requires two 500 slots