Core: High pass filter value

What is the crossover value for the Hi-Pass filter

The HP filter is at 80Hz and is a 4^th order Linkwitz–Riley filter. There is a corresponding LP filter on the Core Sub for use in a sub sat system. There is also some delay added in the Core 7, 47 & 59 when using the HP filter to better time align the subwoofer and satellite speakers when stacked on top of each other.