Features. Constant-Q Bandwidth Design. Overall Level Controls. 20 mm Filter Slide Controls. ±6 dB or ±12 dB Slider Range. Sweepable Low & High Cut Filters. Passive Bypass Switches. Grounded Center Detents at 0 dB. Infrasonic, Ultrasonic, & RFI Filters. Fully Balanced XLR Inputs and Outputs. ¼ TRS Balanced/Unbalanced Inputs and Outputs. Universal internal switching power supply (100-240 VAC).