Shure SCM410 4-Channel Automatic Microphone MixerThe Shure SCM410 4 Channel Automatic Microphone Mixer dramatically improves audio quality in any application in which multiple microphones are required. Features include fast microphone selection, adjustable EQ, and clipping LEDs, and peak responding output limiter. Automatic mixing is a tremendous problem solving tool allowing sound system installers to eliminate common problems such as insufficient gain before feedback and muddy speech quality.