Blinking headlights

Guys...I just put in my stereo and well it kicks ass...but ive been driving it for about 3 weeks now and I have noticed that my headlights are starting to flicker on every bass note. This is a problem with my battery right??? Well I think I have heard fixes for this like a new alternator and yada yada..but I was wondering if there was something cheaper that would fix my problem. I dont want to cut corners or anything but I dont have alot of money as of now ..and i really really hate it...ok anyway any suggestions



TweaK

If a new alternator is the only permanent good solution then if you could maybe please leave a suggestion on one.