the other day my head unit died on me out of noware and the sound from my back seet was half of what it normaly is when i hooked my new head unit up. checked my speakers and one of them was seised. pulled it out and realised the magnet was cracked in half. half on the speaker half on the magnet cover wich was shifted a lil. it sandwiched the voice coil between the magnet and the pole peice. now my question is, aside from wondering how this happined, is can this be fixed and if so how?