Most factory car speakers are cheap. All the money goes into the amp. My last car had the "infinity" package. It sounded really good, better than the blankcrap one in the GTO, but to my surprise the speakers were all made by mitsubishi and made of paper. I replaced them with kenwood ones and they didnt sound half as good. Cheap speakers can sound really good with a good amp, but made of cardboard they will tear easier. Speaking of which i think my left rear speaker sounds blown.