In theory:
the hz-khz is the frequency range. The greater the range the better. khz=1000hz
the larger the magnet, should mean better woofer control, which should lead to better sound.
sensitivity is how loud the speaker plays with 1 watt. The higher the number the better, doesn't neccessarily mean a louder speaker or even cleaner, unless you plan on underpowering it.
that being said, they mean very little. different companies rate each in a different way. which could make the measurements completely uncomparable to each other. The only one that is hard to manipulate is the magnet weight, and it's also the least important.
The sound is a product of a combination of so many things, that its really only safe to listen to the speakers, one little adjustment can be dramatic.
Take your chances with either one in my opinion, they both seem too cheap to be of much quality. But in canada these things aren't cheap at all, and a basic 4x10 will cost $100cdn
now looking specifically at what's there.
kenwood: heard in store only, not the best i've heard by far.
pyramid: were in my car when i bought it. good overall sound, one blew and doesn't work, no apparent reason for it.
pioneer: about the same as kenwood, but for $5 why not?
soundstorm: don't look too good, no experience
mobile authority: again no experience, seem to be pretty good
hope that doesn't just confuse u more
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