the behringer mdx4400 multicom pro compressor/limiter features 4 independent channels of compression and limiting with interactive auto compression circuitry. mdx4400 multicom pro compressor/limiter features ï 4 excellent compressor/limiter channels ï switchable high-pass side chain filter ï interactive auto-compressor circuit for musical compression ï program-dependent attack and release times ï ika circuit for "inaudible" compression ï couple function for 2 channels each ï separate led displays for input/output levels and gain reduction ï servo-balanced xlr and jack connectors ï additional peak limiter with igc (interactive gain control) and control led ï high-quality potentiometer and illuminated switches ï manufactured under iso9000 certified management system