[Elecraft] K3 - Audio/IF filtering definitions

[Al Lorona]

HI and LO cut controls determine the bandwidth, such as the 300 - 2700 Hz (2400 
Hz bandwidth) in the example you provided.

That bandwidth is flat. However, you may elect to shape the bandwidth to 
something other than flat, such as to boost the high frequencies, or cut the 
dreaded "400 Hz bump" present in many signals , or something else. In that case, 
the RX EQ is used to obtain a non-flat audio response. However, the cutoff 
frequencies of 300 and 2700 are not affected in any significant way because HI 
and LO set these limits.

Al  W6LX

>Then what are the hi cut and low cut front panel controls for?  What do
they control?