This is what is listed in the Peavey XR600G Manual (I use Peavey as an example as I have the manual).
The new one, at least on the male voice track I've been trying it on still doesn't seem to do much.
I'm going to have to work more (deeply) into the EQ's that I have.
Low EQ: A shelving type of active tone control that varies the bass frequency
levels (±15 dB at 70 Hz). This will add depth to thin-sounding signals or clean up
muddy ones. As with any EQ‚ use sparingly. Too much of this EQ can give you a
booming bottom end.
7. Mid EQ: A band pass (peak/notch) type of active tone control that varies the
mid-range frequencies (±15 dB at 1 kHz).
8. High EQ: A shelving type of active tone control that varies the treble frequency (±15 dB at 12 kHz). This control is
designed to remove noise or add brilliance to the signal depending on the quality of the source.