Rack mixing desk digital mixing desk series behringer x interface usb 20 mountable number of mono channels 16 number of stereo channels 1 subgroups 12 aux sends 6 aux returns 6 microphone inputs 16 line in 2 effects chorus compressor delay echo gate limiter reverb features wi fi interated matrix input assign real time frequency analysis software equalizer audio interface build in phantom power connections usb port main out anschluss 1 x mast