Compressor Module. All discrete balanced input. Controls include: Threshold, compression Ratio, Release Time. Front switches include: Fast or Normal Attack, Feed-Forward (typical of most VCA based compressors mad today) or Feed-Back Design (typcial of the older classic designs of the 60's and 70's). Always maintains unity gain by increasing the output level as the threshold is increased or the ratio control is increased. Incorporates the ""Famous"" All Discrete API 2520 op-amp and API output transformer. 5 segment LED display displays compression range (5, -10, -15, -20, 25). ""Hardwire"" bypass switch. Takes up one L200 slots.