Comp + usb / optics + Topping MX3s + EqAPO =? three separate channels

[Darek K]

Is this possible to do something like that in config file in EqAPO :

CopyChannel: LFE= something from L + something from R

Channel: L
HighpassFilter
PEQ Filters

Channel: R
HighpassFilter
PEQ Filters

Channel: LFE
LowpassFilter
PEQ Filters

Independently controlling the left and right speakers is obvious, but how to run and configure LFE?

Darek