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My lights still dim even with a second battery.


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OK, you need to perform the Big 3 upgrade and everyone is obviously telling you this. Basically the "Big 3" refers to 2 grounds and a charge lead. These cables are your engine block to battery ground, your battery to chassis/frame ground, and your alternator to battery charge lead. You need to run pieces of 1/0 gauge cable between your engine block and battery, chassis and battery and alternator output stud to battery. You can buy decent 1/0 cable at a lot of places, I recommend Knukonceptz brand cable since it is oversized and super flexible, it also carries the right price tag. Once you do the "Big 3 Upgrade" you will need to be sure you have grounded your amp to a good location, please provide a picture of where it is grounded to now. This way we can verify that it is grounded properly or not and if not provide a suggestion as to where to ground it. Also it would be wise to eliminate the capacitor, they do nothing but strain your electrical system even more as capacitors do little more than suppress voltage change which sounds good in theory but doesn't work in practice as they add resistance and eat current. Here is an excellent paper on capacitors in car audio and why you DON'T need one if you care to educate yourself before taking the advice of a stranger: http://www.glasswolf.net/papers/nocaplesson.html

Report back once you do the "Big 3 Upgrade" and have a photo of your ground and I will be glad to assist you further! :)

I'm gonna hate

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OK, you need to perform the Big 3 upgrade and everyone is obviously telling you this. Basically the "Big 3" refers to 2 grounds and a charge lead. These cables are your engine block to battery ground, your battery to chassis/frame ground, and your alternator to battery charge lead. You need to run pieces of 1/0 gauge cable between your engine block and battery, chassis and battery and alternator output stud to battery. You can buy decent 1/0 cable at a lot of places, I recommend Knukonceptz brand cable since it is oversized and super flexible, it also carries the right price tag. Once you do the "Big 3 Upgrade" you will need to be sure you have grounded your amp to a good location, please provide a picture of where it is grounded to now. This way we can verify that it is grounded properly or not and if not provide a suggestion as to where to ground it. Also it would be wise to eliminate the capacitor, they do nothing but strain your electrical system even more as capacitors do little more than suppress voltage change which sounds good in theory but doesn't work in practice as they add resistance and eat current. Here is an excellent paper on capacitors in car audio and why you DON'T need one if you care to educate yourself before taking the advice of a stranger: http://www.glasswolf...ocaplesson.html

Report back once you do the "Big 3 Upgrade" and have a photo of your ground and I will be glad to assist you further! :)

is the cable for like 3 bucks a foot how much would it cost for the whole big three set up im on a really tight budget....

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Interesting thread.

Lots of good info

Pulsing headlights is caused by a difference in voltage potential.

Depends on your current demands on wether or not the big 3 will help

2008 California state record holder 157.2 Bassrace2009 California state record holder 157.0 BassraceRollin 50's 158.7db2009 King of Cali Bassrace2009 USACi score 160.5 @ 42hz
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Interesting thread.

Lots of good info

Pulsing headlights is caused by a difference in voltage potential.

Depends on your current demands on wether or not the big 3 will help

i like your wording. "difference in voltage potential" that explains it very well. if you understand how electricity flows that makes sense.

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Glad you like the wording.

Its just how it works. Tony C's thread he just madereally hits this home.

2008 California state record holder 157.2 Bassrace2009 California state record holder 157.0 BassraceRollin 50's 158.7db2009 King of Cali Bassrace2009 USACi score 160.5 @ 42hz
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sounds weird, but when I put a ground from alt case to batt (-) I saw more improved voltage too after the big 3. I also have a 14-YO car so the grounds kinda get shitty after a while

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