I've actually heard some pretty good coaxial car speakers. Pioneer makes a good sounding little 6x9, to tell the truth. They're tuned to work well in large cabinets, so they sound nice loaded in a trunk, just like they should. The tweeter isn't too bad. Replace the capacitor and you actually have a pretty good speaker. Very workable if you want to improve the sound of an older classic car but keep the original locations of factory installed components.I just remember the "World Best Speakers" ads all over the place, and thought they were pretty funny. The guy was popping up in discussions about real high end stuff, shilling his car speakers in towers. It was like going to an exclusive jewelry store and having a guy walk up to you with a dozen watches on his arm, selling "Rolex's."