Rack mixing desk digital mixing desk series behringer x interface usb 20 mountable number of mono channels 16 aux sends 4 microphone inputs 8 line in 8 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 master lr xlr midi connectors midi in midi out network connect