Dual channel (31 bands each channel).1/3 octave filter sets (ISO centers).20 Hz to 20 kHz effective equalization range.Constant Q filters.Selectable 6 dB or 12 dB cut or boost range The PV 231EQ is a dual-channel EQ incorporating Peavey's legendary low-noise, low-distortion design. Ruggedly constructed, the PV 231EQs have center-detented fader controls and offer selectable -6 dB or -12 dB gain and an LED display indicating level. Other features include variable-state low-cut and high-cut filters, XLR balanced inputs and outputs and bypass switches. PV 231EQ filters are set at ISO center frequencies within 3% accuracy. Whether on stage, in the studio or simply tweaking your home hi-fi system, the PV 231EQ is the EQ for you. Level LEDs (-10 to 17 dB) Variable state low and high cut filters XLR inputs and outputs for balanced operation Bypass switch with status LED 10 dB boost /10 dB cut Level Control Ground lift switch Unit Dimensions - 19 W x 3.5 H x 7.62 D, Weight - 7 lbs.