The LF tab provides controls for the low frequency band of the EQ. The low frequency band can be set to be a Peak or Low Shelf EQ.
Select either the Peak or Low Shelf button to set the EQ type for the low frequency band.
The Frequency control lets you set the center frequency for the low frequency band (Peak or Shelf EQ).
The Gain control lets you boost or attenuate the corresponding frequencies for the low frequency band.
With the low band EQ set to Peak, the Q control changes the width of the EQ band. Higher Q values represent narrower bandwidths. Lower Q values represent wider bandwidths.
With the low band EQ set to Shelf, the Q control changes the Q of the shelving filter. Higher Q values represent steeper shelving curves. Lower Q values represent broader shelving curves.