Let me not confuse, just clarify for myself and maybe it will help you. What are the fuse ratings on the amp? Unless I am missing something it seems as though that many "watts" through a 4 awg wire is not a good idea. Sometimes times those "watts" you see are overrated numbers. Meaning it is only for like 5 seconds at a crazy high voltage that it can produce those numbers. I am just saying this in order to keep fires from coming out. Like stated above you may want to go with a more effecient CEA- compliant amp. For wiring go here WIRE Helps me out. I am just a paranoid guy though.