dbx Dual-Channel, 31-Band Graphic Equalizer Revolutionary instant encode/decode Type III Noise Reduction in-circuit at the push of a button Increases S/N ratio by up to 20dB Patent-pending Peak Plus Limiter threshold range from 0dBu to +24dBu (off) can transparently tame the wildest hits or the subtlest nuances of any signal Four segment LED bar graph for BOTH Gain Reduction AND Output Level Status LEDs offer visual feedback for all settings on the front panel Inputs:  TRS, female XLR (pin 2 hot), and barrier terminal strip Outputs:  TRS, male XLR (pin 2 hot), and barrier terminal strip Includes: 1x dbx 1231; 1x AC power cord; 1x Operator's Manual; 1x Registration Card; 4x rack mount screws and washers Revolutionary instant encode/decode Type III Noise Reduction in-circuit at the push of a button. Increases S/N ratio by up to 20dB Patent-pending PeakPlus(TM) Limiter threshold range from 0dBu to +24dBu (off) can transparently tame wildest hits or subtlest nuances of any signal Four segment LED bargraph for BOTH Gain Reduction AND Output Level^Status LEDs offer visual feedback for all settings on the front panel