The two microphone inputs are identical apart from the fact that the controls are laid out as a mirror of each other.
Immediately adjacent to the input connectors are the mic input gain controls. Correct gain adjustment for your microphone is essential to ensure good signal control throughout your system. Generally speaking, dynamic microphones will require more gain than condenser microphones.
The 48V Phantom Power button will allow you to use high-quality condenser mics with Zone. If you are using a condenser mic, engage Phantom Power for your mic to function.
The next three controls are for setting a basic equalisation for your mic input. They are independent of any equalisation in WebApp. These are useful for tailoring your sound to a particular voice/microphone combination.
Use the High Frequency control for increasing or decreasing sibilance, which can help with intelligibility. The mid-range controls allow you to choose the frequency around which you can boost or cut, between 200Hz and 5kHz. The lower mid frequencies will affect warmth and muddy sounding voices, the middle range will help to stop 'boxiness', and higher frequencies will assist with intelligibility or harshness.