Sometimes the tonal quality of the speakers themselves or their
installation
is very difficult to overcome with an EQ. You may want to give the
installation another try,

Ummm ... I already cut my door panels ... are you suggesting that I
actually move the tweeters somewhere else?

This is why you always test before cutting!


or even try throwing a different set of speakers
in there at least for testing purposes.

I would need access to some to test.

Circuit City and Best Buy both have 30 day return policies.

What speakers are you using anyway?

I am using the Diamond Audio M661 component speakers.

That would explain it. If you're sensitive to highs like I am, I hope you
don't have those things on-axis...