Is this problem solved jet or do you still have it?

Do you have the same problem with the sony-headunit?
Is there a difference it the engine is running or not?
If this problem occurs only with the running engine it could be the power of the amp which feeds some noise into the system. I had this problem after installing and rewiring a new amp and the Mk2. I installed a filter (like it's delivered with the sony units for example) to the powersupply of the amp and the problem was gone.

The right way would be:
Connect the amp directly to the battery (like you already have done)
Connect the Mk2 to the ISO-connector of your car (perhaps via adapter)
For testing you could try to just connect the important cables (Batt+/Batt-/Amp remote/Ignition sense and the lines)
You could try to connect the unit directly to the battery - to see if the noise comes from powersupply to the Mk2.
Be sure to stop the engine - it could add noise, too.
Stop other electrical components like Nav, too.
You could disconnect any cables used by the Mk2 which you're sure it doesn't need/aren't fed right.
Be sure that the lines are correct and not accidentially crossed.
Disconnect Line In at the Mk2 if you have connected a unit there (just for testing purpose)

Then run the Mk2. The sound should be clear.
Have you already hooked it up at home with volume at 0 db ? Any noise there? That's a good essential proof for the sound quality of the Mk2.

If you still have the noise - try if you can change it's volume/sound by playing with different frequencies of the equaliser.


TeeMcBee
Got my Mk2! # 080000143