something is still missing

turbodog

I set mine up like Speedfreak described. Pioneer HU, Alpine component speakers, tweets angled toward driver ~15 degrees.
I run the fader biased toward the rear (door speakers) significantly to keep the tweeters balanced with the door speakers. Not sure how other folks tolerate it.

One theory: with both hooked up to the same channel, the door speakers are in parallel with the tweets at high frequency, so the power to the tweets at those frequencies may be reduced (shrug).