API AUDIO 550A Special Edition 500-Series EQ Module

Experience the simplicity and acoustic superiority of a legendary EQ with the API Audio 550A, a 3-band EQ module for 500-series racks with ±12 dB of boost/cut per band. With switchable shelf/peak operation on the low and high bands and proportional Q circuitry for narrowing the filter bandwidth at the extremes, the 550A is a versatile and intuitive EQ module.