Analogue mixing desk series behringer xenyx interface usb number of channels 18 number of mono channels 6 number of stereo channels 4 subgroups 2 aux sends 3 aux returns 2 x stereo channel inserts 6 microphone inputs 6 line in 6 filter high pass filter effects dsp multi effect equalization 3 band eq with semi parametric mid range graphic 9 band master eq features audio interface build in phantom power display led meter