Paul Henry

HI just a question i have a pair of KG4s and i noticed when i looked to replace the crossovers that on some models it says 4 ohms on the others its 6 ohms. How hard are these to redo if i buy the Crites kit myself or have them do it for 25 or so more I had a bad tweet and i replaced the diaphragm and they still sounded dull any help