I have the non hi fi system and just installed the following:

Audio Control LC7
JL Audio 300/4
Pioneer separates in the doors
Infinity 6X9's in the rear

I used the newministuff.com harness and haven't cut ANY WIRES
The Audio control LC7 is grounded and gets power directly from the battery
The JL Audio amp is grounded at the rear seat bracket which has the paint ground away for a good connection.
4GA wire was used for ground and power
Rockford Fosgate twisted signal wire was used and is routed down the center console
Power is routed on the passenger side
When I'm listening to the Ipod (which is connected directly to the LC7), I get perfect sound with no hiss
However, when I even TURN on the radio, there's a LOUD hiss. I have not touched the ground for the factory head unit so I'm not sure what the source of this hiss could be.
Any ideas?

 

no clue go to a best buy or call geek squad and tell them srry im not more helpfull

 

i would try running a ground from the amp to the radio chassis and see if that does it for you. whenever ive used LOC's (always basic 20 dollar ones) never an issue

 

We were using the LC7 to get Ipod integration. We ended up back tracking and getting some LOC's and it took care of the problem only now no Ipod integration. Thanks!