Need someone to repair my SPL Ext3000D

Hey guys.. (my german and english is not so god, so i hope you can read is anyways)

for a few month ago i "burned" my 2x SPl dynamics Ext3000D.. I spend a lot of time to find someone here in denmkark, who may could help me fix them.. but with NO luck.. some guys told me that there is a few shops here i Germany that could help me repair them.. So i hoped someone in here know SOMETHING.. It's pretty sad they dont work anymore
the reason why the dont work anymore is because not enough power, that part is one of the few thing i know they dont like

some one who knows how much is will cost to fix them maybe??

Best regards
Nicky