Rocktron Hush Pro, stereo noise exterminator for studio and stage applications, stereo, inputs: 1 x XLR, 1 x 6.3 mm (channel A), 1 x XLR, 1 x 6.3 mm (channel B), outputs: 1 x XLR, 1 x 6.3 mm (channel A), 1 x XLR, 1 x 6.3 mm (channel B), reference level: +4, -10 dB, threshold control for noise gate, threshold control for HUSH, efficient gating up to 72 db, frequency response: ± .5 dB, 10 Hz - 27 kHz, dynamic range: 105 dB, Incl. power supply.