It’s Capacitor Time
Having your dash lights brighten and dim in time with the music may seem cool at first, but deep down you really know it can’t be good for your electrical system. What’s going on? What could cause such a problem? When this happens, it is because your car amplifier is asking the vehicle for more power than the vehicle can supply. The result is dimming lights in the vehicle and clipping in your bass system.
The answer is a capacitor; a component that charges and discharges very quickly, giving the amplifier the power it needs to hit hard. A Bonus is that the amp stays cooler and produces less distortion. A general rule of thumb for capacitor size is one farad to 500 watts RMS amp power. You can double that without a problem. A still, bigger cap might seem like a good idea, but it can stress your vehicle’s electrical system if you have a stock battery and alternator.