@pindac WtF are you on about - AGAIN?? I believe it's you who've done this before - typed unknown character strings expecting us all to know WtF you're trying to say! STOP these dumb and useless characters that no-one understands.
OP - a decade ago I changed the XO parts in my JBL L100 Century's, and the difference, once 'run in' was amazing - in a good way. I'm currently investigating changing out the XO parts in my maggie 1.7i's, as the quality of those original parts is,,,, garbage. Even Magnapan, now that Jim has gone, have woken up to this (or 'allowed' to) and are now producing speakers with an 'X' after the model number, which shows that they have much improved XO parts and, 'supposidly' (anyone heard an A/B between an X model and a standard model?) sound a LOT better. Mind you, the X models add a MASSIVE, c50%, to the price!