I added a bigger amp for my 2 12's and I noticed my lights dim when it hits a big bass drop. Ive heard of people adding capacitors and that helps. I was thinking about adding a bigger alternator but cant find anything online. Anyone know where I can get one or does anyone know if a capacitor will stop the lights 100% from doing what they're doing?

 

wont stop the lights even with a cap

i had a 2 farad cap and they still did that

what helped the most is when i added a few extra ground points to the motor (cheapest way is to get a ebay grounding kit dont get anything special like the circle earth stuff from hks, its not worth it)

a beta 2 alternator supposedly is 10 amps stronger and bolts on but i havent had the chance to test that out yet

 

Easy enough to make your own ground wires too. Just buy 10 or 15 feet of wire and some ring terminals. Then you can make them the exact length you need.

 

A higher amp alternator won't help at idle.

Upgrading the power (alternator to battery) and grounds helps a lot. A capacitor can help also, but only if you're not producing way less current than the amp is trying to push.