Channel 3/4 is a classic stereo line-in with large jack sockets. Line signals can also be fed in using 6.35 mm jack plugs. This compact mixer offers six channels of which the two mono inputs 1 and 2 are equipped with combo sockets. The Mackie ProFX6v3 is a much smaller version of the series. In addition to the new design, there are now Onyx microphone preamps, 2 × 4 USB recording, 24 practical GigFX effects, and an extensive software package for download. Mackie presented the FX6v3 among the three-series classics with useful upgrades.