Stereo two-way, mono-channel three-way electronic crossover. TRS or XLR differentially balances input and output. Choice of stereo sound or ultra-low sound synthesized by the addition of left and right channels. Two channels are selected X10 range switch. Two channels have 40Hz high pass filter (frequency cut end). All outputs with phase reverse switch. Therefore, the output spectrum can be independently adjusted average dB/oct Linkwitz-Riley filters (the professional standard). Stereo/Mono status indication LED lights, indicate the selected mode of operation.