Originally Posted by 2fast4thelaw

The initial harshness will go away after break in. A lot of your issue with lack of mid bass is the door panels in the Z. I can't wait until fiberglass door pods are available from Wicked CAS for the 370. I bought a set for my 350Z and they made a HUGE difference in bass and overall output. The door pods aim the speaker towards the listener and imaging is dramatically improved.

I had a set of the older KP series and they sounded like 10's in the doors.