The Katowice from XAOC Devices is a combination of isolator (kill equalizer) and crossover and is therefore more like a filter. The circuit is designed for stereo signals, which also includes the individual frequency ranges Low, Mid and High. The calibrated module contains three VCAs that can control the level of the three bands. The control range here is between 0 dB (Unity Gain) and -105 dB, which corresponds to a cancellation of the frequency range. With Band Config, the crossover frequency between the three ranges can be set within the range of 1-10 octaves and 160-10,000 hertz.