Each band is an individual band pass filter with adjustable center frequency, quality factor Q and level.
The three frequency bands are 31Hz - 1.6kHz; 100Hz - 4.8kHz und 300Hz - 16kHz.
Q controls sharpness of the filter. At low settings it sounds more like a traditional EQ, at higher settings the sound gets more resonant and abrasive.
The level controls are neutral in center position. Counterclockwise they cut the signal, clockwise they boost it.
The overall level is set with a separate potentiometer and the EQ can be deactivated with the bypass footswitch.
audio input and output, 1/4" mono
input for external power supply, 9-24V DC, center negative
110 x 70 x 50mm