see
http://madisound.com/replace.html
This seems to imply that if you change the tweeter then you'll have to modify the crossover, but that this is a perfectly feasible thing to do with a given cabinet.
You might want to call Madisound and ask their advice. I haven't used them personally, but I see them referred to frequently on hifi boards. I think they'll supply the designs for the modified crossovers based on your information.
Good luck ... be careful !
http://madisound.com/replace.html
This seems to imply that if you change the tweeter then you'll have to modify the crossover, but that this is a perfectly feasible thing to do with a given cabinet.
You might want to call Madisound and ask their advice. I haven't used them personally, but I see them referred to frequently on hifi boards. I think they'll supply the designs for the modified crossovers based on your information.
Good luck ... be careful !