I think that the alt should handle the load all day long. I have a stock 60A alt in my truck and a crappy tire "TERMINATOR" batt and it beats my JBL 1200.1 and 180.2 all day long at full volume! Try cleaning your batt posts and all your terminations. EI Batt to alt, Block to ground, Batt to ground, Batt terminals, Power and ground on your amps too! Also it will help with the slight dimming lights and will never hurt if you upgrage the charging system wiring. Use 4ga, most factory charging systems use 10 to 8ga. That will help ALOT!!

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-Pioneer<br />-MB Quart<br />-Pheonix Gold<br />-JBL<br />-Infinity