You definately don't need a bigger battery. I would definately check your alternator. If it is your system, what you need is a capacitor. The amount of power your system draws is not a constant. Every time the bass hits, it draws more power. What a capacitor does is store power. That way, every time your sytem draws a large amount of power, it takes it from the capacitor and not your battery. If your headlights flicker everytime the bass hits, you definately need a capacitor. I would first check your alternator first to see if your charging system is working.

Allan
2008 Magnetic Black 350z NISMO /1976 Austin Mini 1098 Special (export)

Member# 1980