TRS or XLR balanced inputs and outputs differential / Choice of stereo or the sum of the synthesis of left and right channel subwoofer X10 range are two-channel selector switch / Two channels have 40Hz high pass filter (low cut) All outputs with phase reverse switch / The output of all bands can be independently adjusted average 24dB/Unkwitz-Riley filters (the professional standard) - Stereo / Mono status indication LEO lights, indicating that the mode selection unit RS or differential balanced XLR inputs and outputs. Choice of stereo or the sum of left and right channels while the synthesis of ultra-low sound. X10 range are two-channel selector switch. Two channels have 40Hz high pass filter (low cut) all the outputs with phase reverse switch. All the bands on the average out put can be independently adjusted dB/ Linkwitz-Riley filters (the professional standard). Stereo/mono status indication LED lights, indicating that the choice of unite of work pattern.