I have over 20 years in modding the weak point in most loudspeakers ,many mfg use average parts at best , I almost alway upgrade my own the same values inside
just far bette quality , go to humble homemade hifi capacitor test ,
Jantzen foil wax paper inductors path audio resistors , or Mundorf ultra resistors .
connectors many use cheap gold over brass,WBT Copper far better conductor is preferred ,
the Xover it’s the brain 🧠 or ♥️ of your speaker just look up the above Tony Gee is the man and has helped me ,. I just felt it needed to be said . And can give you over a 10% improvement