Do you have your DSP profile that you can share?My last post was lacking details. Here we go..
When I installed initially i "fiddled" with the DSP configuration. I did try the prebuilt profile but I did not like it one bit. So I built by own with the 850 configured with original programming. I may revisit the prebuilt profile now that the 850 is not interfering as much.
IMO if you want the best possible efficient sound out of the system I would recommend getting the door speakers replaced with 2ohm components, modify the system with the vagcom guide and then play with the DSP software to Tune to your liking.
Thats my plan but I don't have $1,000 to drop on 2Ohm components right now.
I do plan on running a larger gauge power line to the amp when I install the 2ohm components also as the Watt's will crease big time with 2ohm speakers!