With a total of 20 line inputs plus a 2-track input, unusual flexibility and professional audio quality, the MX2004A has become a favorite for a wide variety of applications. All eight mono channels feature our INVISIBLE MIC PREAMPS, balanced line inputs and inserts. The four stereo channels have dual 1 /4 " connectors. All channels are equipped with first-class equalizers, high-quality faders, PFL/solo-in-place and mute functions. Additional features include two aux sends and two stereo returns, an extra stereo bus plus extensive monitoring and connection options