I'm trying to figure out how to tune this system, but I am not picking up on things like slope, roll off, out of phase, etc!!

The car is a new '12 VW Beetle. I had all this gear in the last vehicle, but took it to a shop to have it tuned. It was AMAZING!! I could not believe how well the Polks sounded, particularly with instrument clarity and mid-bass. The drivers would literally blow my pant leg.

This install is much better than the last car. I've used second skin on the door panels and around the rear speaker locations. Custom mdf adapters for the doors and wired everything from the amp. I could take it back to the same shop to tune, but I'd really like to figure this out so I can do it in the future.

The HU has a decent amount of EQ in it. I think the amp is pretty standard on HP/LP and x-over's. I'm not sure if I should run the tweets out of phase or not?? They're in the sail grills above the door panels in the front corner of the window and face direclty at each other.

Alright, here's what I'm working with:

Kenwood Excelon 995 HU - http://www.kenwoodusa.com/Car_Entert...ivers/KDC-X995

Rockford Fosgate P400-4 - http://www.amazon.com/gp/product/B00...00_i00_details
The birth sheet on this amp shows it doing 120w RMS at 2ohm...not sure what it's doing at the 2.7 ohm the MM6501's run at.

Polk MM6501's all the way around (2 pair)

I'm also running a RF Power P2 10" off the RF Power 300w mono amp.