Dbx 231 features
Dual-channel, 31-band, 1/3-octave, constant-Q graphic EQ.
Switchable boost/cut ranges of +/-6 or +/-12 dB.
20mm non-conductive sliders.
12 dB per octave, 3 dB down at 50 Hz low-cut filter.
+/-12 dB input gain range.
Front-panel bypass switch.
4-segment LED ladders for monitoring output levels