Glensound SW 8:2+ 8 Channel Source Selector/ Switch/ Mixer With PPMThe Signature SW 8: 2+ is a broadcast specification, 8 mono 4 stereo source selector switch mixer with PPM. There are 8 balanced audio inputs on 3 pin Neutrik XLR sockets on the rear panel and these can be set globally to be 8 mono inputs or 4 stereo inputs. On the front panel there are 8 large illuminated buttons for turning sources on off. They work as 8 individual switches when in the mono mode and 4 pairs of stereo switches when the SW 8: 2+ is