ok so i have a 86 mustang gt, i just put a Sony xplod amp 600 watts bridged. i have a kicker 10 inch sub woofer. i have the amp turned all the way up and when i turn on my lights they dim with the bass also the radio does too. when the lights are off the radio doesn't dim. is this normal?

 

Why is your amp turned all the way up? Your alternator cant handle the load so its drawing from the battery.

 

because it sounds better i could turn it down but i thought it sounded better

 

A capacitor might work. If not then a new, more powerful alternator. If you go the capacitor way, for your system I would get a 1 farad. That means its good for up to 1000 watts

 

It is now widely accepted that capacitors do not (and can not) have any affect on Car Audio.

 

soo is there anything i can do, just change the alternator??

 

Move the power source closer to the amplifier. (Hint: The alternator isn't the power source.)

 

move the battery???

 

first, turn the gain down on the amp, it should not be above 3/4 full.

I would start with a better battery first, bigger alt 2nd.

 

What gauge wire do you have ran to the back? Also how is your ground wire? Did you sand the metal down and bolt it down or did you just philip screw it down? You should defiantly not be maxing out your gains. Also look into something called the big 3 first. Maybe throw a small battery in the rear like a Kinetic hc600 or something like that.