03 Audio

Does anybody know the speaker sizes for an 03 with NAV? I'm wanting to switch out the door speakers but not what size they are.

Unless they changed, they should be 5x7.

You're aware those speakers were custom designed for the THX head unit? You may find yourself with some interesting sounds if you change the speakers and not the head...

Well, I want to amp the new speakers, so with a decent amp can't I still get what I need out of it?

Does anybody know if the NAV HU has RCA outputs on it or anything? How are the stock amps wired to the HU?

I don't know of anybody who has torn into the THX system... I'd SERIOUSLY doubt if it has any aux. outs. I wouldn't be concerned about power. It the custom THX EQ that I'd be worried about.

Is the EQ built in to the HU or is it a seperate unit?

It's built into the HU circuitry.

I went an email to THX requesting any technical information they may have available. Hopefully I can figure out what type or frequencies they have for the speakers and what not so I can shop for something that will fit well with the HU.