I just upgraded the crossover in my Kappa 9's. I replaced the caps and resistors with better quality ones. I left the inductors alone. The result is they sound a whole lot better than they use to. Well worth the effort. My advice to you is get yourself a soldering iron, solder, flux, de-soldering wick and some old junk circuit boards and learn how to solder and de-solder first before you mess with the crossovers. If you are going to do this, you might as well know what you're doing.
Soldering Tutorial http://www.audiodiycentral.com/nt_soldering.shtml
After you are confident in your soldering skills, then try your hand on upgrading your crossovers. A schematic would be helpful. If you need ideas as to what caps and resistors to use, talk to Jeff at www.sonicraft.com He is a cap expert and knows what he is talking about. The results in upgrading a speaker crossover can be very positive if you do it right.
Soldering Tutorial http://www.audiodiycentral.com/nt_soldering.shtml
After you are confident in your soldering skills, then try your hand on upgrading your crossovers. A schematic would be helpful. If you need ideas as to what caps and resistors to use, talk to Jeff at www.sonicraft.com He is a cap expert and knows what he is talking about. The results in upgrading a speaker crossover can be very positive if you do it right.