Need a new alternator with more power, Lights dim:( Options

[Legit94GT]

Well i put in my sound system quite awhile ago i guess and after i broke everything in and finally bought an i pod for it, i realized that when i have it cranked way up at night all my lights dim:(

I know this is because my alternator isn't putting out enough juice, so i need to upgrade it to put out more.
I have called a few shops and no-one wants to build me for less than like 600 dollars, or sell me a "high output" one for around the same... I was thinking that this would only cost like $2-300...

Is getting a bigger alternator really that expensive or am i just looking in all the wrong places?
Anybody have a useful link or company name let me know:)

thanks
alot

[GTS13]

Well, here's the skinny on "high-output" alternators. High-output alternators take better advantage of high RPMs over stock. The only issue with that is they actually put out lower numbers when you're idling. My recommendation would be to complete the big 3 now, and add a capacitor to your setup. My general rule of thumb is at least 1 farad for every 1k watts. And don't forget to charge the capacitor before you install it.