G23 stereo help

I have replaced the factory amps in my G23 with a JL MHD 750/1 and MHD 900/5 and now I have an odd problem where my factory clarion head unit turns off or basically resets itself (which also causes my amps to reset themselves since remote turn on is wired to the HU). The amps are powered by the 4 ga factory wiring. The problem only happens at high volume levels. The amp gains were set using test tone cd and voltmeter per the JL manual. If I turn down the gain on the sub channel the problem goes away. I'm thinking that the amps are drawing too much power causing the voltage to drop below spec for the head unit? Any thoughts on this?


Another unrelated problem I'm having is static and poor sound quality through the HU aux input. I have plugged directly into the aux rcas to rule out a bad 3.5 mm jack or noise due to improperly run rcas and still had static and poor sound quality. When I hook my iPhone up though the USB port the sound quality is great. HU is factory Clarion CMD8 I think. Any suggestions please help....