beng — All four speakers (L/R and F/B) have both tweeters and woofers. The front mid/tweeters are right by the windshield, which is the correct place to prevent interference between the direct sound and windshield reflections. The rear speakers have the tweeters mounted inside the woofer cones. In my opinion (I'm in electro-acoustic research), the sound is pretty neutral with the controls set in the middle ('0' in my non-NAV). It's by far the most neutral car sound that I've owned. There's no lack of highs (they're just not exaggerated), but there's perhaps a bit too much mid-bass. If you prefer to boost both the bass and treble settings, you are definitely not looking for neutrality in the reproduction.

Stan