i'm a newbie and i just recently purchased my first subs. their two 12inch subs connected to a 2 channel soundstream amp that only puts out 120 watts RMS to each sub. at night my lights dim, and the tach meter constantly moves up and down when i'm at a stop sighn or red light.
Whoa, you shouldn't be ignoring those signs. There is no time limit on alternator's life. I can go any minute. Most modern cars should be able to handle 240W amp with stock alternator. If you like your car, I would seriously consider getting an alternator upgrade. A 1F cap might help with the light dimming but will NOT replace alternator. It could also be a sign of weak battery. How old is it anyways? You might want to get yellow top from Walmart.
samuel sutton i fell sorry for you. if you could be so kind has to inform me of what type of car you had, i've always thought that on average a car could handle up to like 2000W or something, anyways thats strang that your alternater is doing that like isaac said i believe your ALTERNATOR is about to DIE.
i have a 2000 mazda 626 4 banger. i'm not sure how many amps the alternator is. when i turn the volume down theirs no light diming or anything. the diming isn't all that noticable, but it is to me. i'm thinking of upgrading to a 200 amp alternator, do you think that will be too much?
When's the last time a guy admitted he had too much power? It's never enough If you can get 200A to fit in your car, do it. What's different about alternator is that, it will not supply 200A to a device unless it requires it. So you can't over current and blow.