what type of damage? if it's just a recone then that's easy. otherwise it might be a bit of a pain tracking down a replacement since I haven't seen those drivers on the market for a while.I built these O/4's twenty years ago. One of the Carbonneau CG-258R 10" woofers has some damage. Fried used to sell upgrades for their speakers. Any suggestions for new guts for my transmission lines?