The people that brought us the venerated Dahlquist DQ-10, manufactured a crossover that did absolutely minimal damage, to one's high-pass signal.
ie: https://sites.google.com/site/mpbarney/home/dahlquist-dq-lp1
The old (quite literally, like me) Dahlquist guys at Regnar, are still supporting the unit.
https://dahlquistspeakers.com/dahlquist_speaker_service-20dq-lp1-htm
I updated, modded, used and loved one, for very close to three decades, with numerous amps and excellent results.
They've gotten as hard to find as hen's teeth!
Were you to search for and purchase a unit; one simple (but critical) mod, is to replace the cheesy, OEM RCAs with something like these, which fit the PCB perfectly:
https://www.wbt.de/english/products/a/Detailansicht/Artikel/topline-cinchbuchse-3.html
As mentioned: hard to find now days, but: well worth the effort!