Try to upgrade your ground wires! The stock ground (from the negative post) is only 10-12 guage I think... its tiny! Upgrade it to the bigest wires your using on your amps...
Also, upgrade the groung wre from your battery to your alternator..
Upgrading to a yellow top solved all of my problems... my headlights used to go off when my subs hit... now I have enough juice to power 2 cars at the same time.. lol
