3.1 EQ SectionAPI 550A ControlsLow Band GainRange-12dB to +12dB (2-3dB steps)Default0dBLow Band FrequencyFilter typesShelf, BellDefaultShelfCutoff points50Hz, 100Hz, 200Hz, 300Hz, 400HzDefault50HzMid Band GainRange-12dB to +12dB (2-3dB steps)Default0dBWaves API 550 User Manual- 8 -