Alto Professional AEQ215 | Stereo 15-Band Graphic EQ with Ultra-Low-Noise Frequency Control Balanced XLR 1/4 TRS and RCA input and output connectors Constant Q filtering provides accurate and predictable EQ response Selectable boost cut range of 6 dB or 12 dB for more precise gain control Standard 20 mm center-detented sliders allow easy frequency adjustment 2/3-octave spacing Balanced XLR 1/4" TRS and RCA input and output connectors^ Constant Q filtering provides accurate and predictable EQ response^ Selectable boost cut range of 6 dB or 12 dB for more precise gain control^ Standard 20 mm center-detented sliders allow easy frequency adjustment^ 2/3-octave spacing