Lights Dim

[mitch1987]

Hey

I have a problem with my headlamps dimming when there is bass, and I only have a 150 watt RMS sub... My battery is new and I checked the output voltage of the alternator with everything off and then with the headlights, defrost, fan on ext and it gave me about the same thing about 14.20 volts... I have also noticed that when i'm at idle and i rev the engine quickly, the lights dim very slightly once for a fraction of a second.... Could this be a bad connection or ground somewhere? My sub isint that big to make the lights dim like they do

I was checking the lights again at idle and the actually get brighter for a fraction of a second which i guess is normal since the alternator puts out more juice since its turning faster...