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  #1  
Old 11-06-2012, 10:39 PM
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Default Capacitor for subs?

I noticed my dome lights tend to strobe a lot when I have my subs on high. Also my HID's and fog lights flicker. So I was thinking about buying a capacitor since it would be cheaper than buying a new alternator.

So my question is, does anybody use a capacitor with their stereo setup and what would be a good brand on a budget?
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Old 11-06-2012, 10:43 PM
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I have a 3000w kicker amp with 2 kicker 15s subs and no problems.... I have the smaller 136amp alternator too, smaller for the 2500s
I believe a capacitor will work but it is just a bandaid for the problem. .
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Old 11-06-2012, 11:12 PM
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Hmm...Well I just did a little more googling and I think I'll try "the big three" first. If it doesn't solve my problem at least I'll have the comfort of knowing I have better wiring :P
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Old 11-07-2012, 09:22 AM
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You do not need a capacitor....period
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Old 11-07-2012, 09:03 PM
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Anyone have any other ideas then? Because any time my bass is up real high all of my lights flicker along with the bass. I'd rather try the cheaper routes first.
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Old 11-07-2012, 09:27 PM
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Do the big 3 first. It made a huge difference with my PDXM12. Only my dash lights dim now compared to everything before.
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Old 11-13-2012, 07:26 AM
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I threw in a 1 far cap in mine and it helped alot. I still notice at idle if I have the bass turned way up my voltage gage will move very slightly. I think my line running from the cap to the amp needs to just be shortened a bit. I did find out till stopping by an audio place that the wire has to be under 18 inches in length.
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Old 11-13-2012, 07:50 AM
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What is this "Big Three" people speak of?
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Old 11-15-2012, 12:00 AM
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Quote:
Originally Posted by Grubrunner View Post
What is this "Big Three" people speak of?
Oh trust me I know what you're talking about. Then I used google :P. But apparently "the big three" are the three wires from your battery. The positive going from your alternator to the battery, the negative going from your battery to your frame, and the negative going from your battery to your engine block. If you upgrade those to a larger gauge, they should make your electrical system more efficient. Obviously I didn't explain it as well as many others but you get the just. There is a guy on another forum that has a youtube video of his "big three" upgraded and how he added a second battery if you want to see how to do it.

Here's the link:
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Old 11-16-2012, 08:36 PM
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I've been doing car audio stuff since before I could drive (just turned 30 a few weeks ago). Capacitors (at least in my area) used to be recommended by every shop and used by everyone with aftermarket components in their cars and trucks. NOW, nobody runs them. Most sound shops don't even stock them anymore. The main reasons for this is that the other (proper) fixes have gotten cheaper and there have been serious problems with caps (shorting out, creating draw..that kinda things).

The "BIG THREE" upgrade works best if you use larger gauge (2 or even 0 gauge) wire that is specifically designed for use in car audio.....(Stinger is what I run, but other audio companies wire is just as good). Using Advance's $2/ft 2 gauge wire will work and you will see some gains but not nearly as much if you use a quality wire.

If you still have dimming issues, make sure your alternator is producing what it should be and that your battery is in good working order with terminals and connections in clean order. If either of these are not up to par, look to replace them with something a little bigger than factory. If anyone tells you that they can "beef" up your alternator......RUN! RUN QUICK AND DON'T LOOK BACK! As these modifications (re-wrapping, smaller pulleys, etc.) to your alternator work at first, it won't last long at all! From what you paid dude to "beef" up your alternator and what you spend to replace it after it cooks itself, you could of bought something worthwhile and proper.

Make sure the wiring to your amp is of good quality and in good condition. If not, replace it. Make sure your ground is of equal gauge and quality and that it is grounded to shiny clean metal.

If these things all check out or don't accomplish fixing your dimming issues then you're gonna have to bite the bullet and upgrade to a high output alternator and/or high performance battery.

Hope this helps........
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