Compact Mackie Mixer Quality with Onboard Effects! The midsize Mackie Mix12FX desktop audio mixer offers you the full-scale functions and the quality everyone here at Sweetwater has come to expect from Mackie. Four microphone preamplifiers with switchable phantom power, 3-band EQs, and 75Hz highpass filters accommodate a wide range of mics and mixing conditions. Another four stereo channels let you connect keyboards, media players, and other line-level gear. Each channel also comes with an FX send, which lets you tap into Mix12FXs effects processor. Twelve onboard digital effects make it easy to add reverb to vocals, depth to drums, or atmosphere across your mix.