2 X 31-Band 1/3 Octave ISO Spacing. RF Filtered Servo-Balanced Inputs. Constant Q Each Band. Bypass Switch For EQ Comparison. Low-Cut Switch Each Channel. Gain Control Each Channel. Led VU Meters. 19″ Rackmount 2UPower supply:115/230Vac- 50/60Hz (IEC)nFrequency response:20Hz-20kHznInput impedance : balanced:40k ohmsnInput impedance : unbalanced:20k ohmsnOutput impedance : bal/unbal:330 ohmsnChannel separation:>50dBnSignal to noise ratio:>102dBnTHD:0.005%nDimensions:482 x 88 x 139mmnWeight:3.3kg. The CEQ231 is a 19″ 2U rack mounted dual 31-band graphic equaliser- which allows the adjustment of labelled frequencies via the individual cut/boost faders. Up to 12dB of cut or boost for frequencies ranging from 20Hz to 20kHz for ultimate EQ control.. graphic equaliser-19″ graphic equaliser-rack mount graphic equaliser