Hi I just installed a AVIC-D3 in my car with 2 12inch Kicker L7's with a Hifonics Brutus amp 1600 watts, but for some reason my radio reception gets really scratchy when my amp turns on also I always hear some static noises and pulse noises come from my subwoofers even tough my unit is turned off. Also when I do have some source turned on my unit my system does not hit properly so what could be the problem?