Come on, just admit that the factory speakers are some of the crappiest you've ever seen. Even if they had a poly cone, rubber surround and a tweeter, they'd still sound terrible due to the tiny magnet and voice coil and flexible plastic basket.
Plastic baskets work fine if they're nice and thick, and braced properly like the Infinity Kappas have. I know--I had some in my old car and they were great. The Kappa's magnet is pretty small compared to most high-end speakers. But, generally speaking, high-quality speakers have bigger magnets to house their heavy-duty voice coils and provice high power handling. There's a reason that some high-end 15" subs weigh upward of 50 lbs, you know--and easily handle over 1000 watts, too.
Pretty much everyone agrees that the Infinity Perfect 6.1 compenent system is a great pair of speakers. Look how big the magnet is on them...and how about that heavy cast aluminum basket?
Of course there are exceptions to every rule. But it's pretty easy to tell the general quality of a speaker by looking at how it's built. Like you said, just because it has a plastic basket doesn't automatically mean it's crap. It's just when you see poor examples of technology, like the flimsy plastic basket on our speakers, or the tiny magnet (strontium) that you wonder why they'd even waste the money to make these things.
Bookmarks