Myself being a modded I looked at the Xover it is average at best
judt by changing the 2 - $1 resistors with Path audio resistors
and the 2 capacitors with possibly VH Audio Odam
you are speaking at bare minimum 10%+ increase in fidelity across the board.
I may do this , I just wish the Zbass would have gone down to 30 hz 35 hz is ok
but considering their depth a bit bigger bass driver would have checked all the boxes.