About this item Input Connectors XLR, Input Type Electronically balanced/unbalanced, RF filtered, Input Impedance Balanced >50k ohm, unbalanced >25k ohm, Max Input - >+22dBu balanced or unbalanced, CMRR >40dB, typically >55dB at 1kHz, Output Connectors XLR, Output Type - Impedance-balanaced/unbalanced, RF filtered, Output Impedance- Balanced 60 ohm, unbalanced 30 ohm, Max Output Frequency Response < 3 Hz to > 90 kHz, +0/-3 dB, Signal to Noise Ratio Dynamic Range Crossover Filter Type Linkwitz-Riley, 24 dB/octave, state-variable, Low cut Switch Activates 40 Hz Butterworth, 12 dB/octave high-pass filter, one switch per channel, Phase Invert Switch Mode Switch - Selects stereo/mono and 2/3/4-way operation, LF Sum Switch - Selects normal (stereo) or mono-summed low frequency operation and disables Ch 2's low output phase invert LED to indicate that this output is not operational in the LF sum mode. › See more product details