SteveSLK06

I've never installed speakers before so bear with me.

I have pulled out the Audio20 and have installed a Kenwood DNX7120 using a wiring harness to avoid cutting factory wiring.

I'm happy to post pics of the Kenwood install with my 'stealth' garmin GXM30 XM radio/traffic receiver if people are interested.

I want to replace the stock speakers with new speakers. The Hertz setup from another thread looks like a great fit. I've never replaced speakers before, and for now I'd like to simply use the outputs from the Kenwood head unit to the newly installed Hertz. I'm comfortable with removing the door panels.

At first I thought I could simply remove the existing speakers, replace with the Hertz set and go, using the existing wires at those locations. I suspect I'd be missing something important though (eg the new crossovers).

I understand in an Audio20 R171 the speakers are hardwired to the headunit (and not thru a separate audio gateway/MOST network). If so, does the car actually have built in crossovers somewhere to split up the frequencies to the existing 3 way set? When I wired in my headunit, all I did was hook up the front and rear speaker wires to the harness, so the frequencies must be divided somewhere downstream.

Question:

How do I install the midbass, 3.5" midrange and tweeters? I know they can all go in the spaces left by the original speakers but where and how would I install passive crossovers (or should I)? Again, I'm planning to stay with the Kenwood's outputs as I don't really need really high volumes.

Thanks...
- Steve