i have focal components up front, the driver side door mid woofer caught fire and the tweet is ruined also. they are ran off of a kicker zx650.4 amp, i noticed thier was some moisture in the door. crossovers are in the door also, can my amp send dc voltage to the speaker or does it have proctection circuitry???? what are the possilble causes of this, i know its impossible for anyone to tell me exactly what happend in my situtaion,. but how could this even be possible to being with???? thats where i need to start,, i was told to send the amp into kicker . im trying to decide if the amp caused this or the focal components,,, the amp and other speakers work fine now , i disconnected the driver side door and all other speakers and subs work fine. the fire on the speaker was very hard to put out also, at first i noticed something smelling burning, then i saw flames under the door panel. the fire did not want to go out easily!!!!! i have had to replace theese focal midwoofers before in the past but i thought it was due to playing them to loud and they simply stoped working after a couple of years . this time i made sure not to go to loud on them and all of a sudden one catches fire!!!!