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    Capacitor for better SQ?

    Hey guys, I've been reading a lot online about how capacitors give better sound quality due to stiffening of voltage to the amps. What are your thoughts or experiences on this? I already have a high output alternator but there is still a voltage drop of 14.4 to 13.8 volts on music



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    Re: Capacitor for better SQ?

    A standard "stiffening" capacitor will have a voltage drop, so that isn't going to raise your voltage above 13.8. What power wire do you have and how many runs?




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    Re: Capacitor for better SQ?

    Good point. I have one run of 0 gauge for the sub amp and a separate 4 gauge run for speaker amp. Problem is I don't really want to add more weight with another battery and I don't see the drop to 13.8v as being very harmful to the amps



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    Re: Capacitor for better SQ?

    Bank of 6 supercaps wired in series will help



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    Re: Capacitor for better SQ?

    full run for ground?

    try doing two runs of power to each amp




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    Re: Capacitor for better SQ?

    Yeah caps do very little to nothing, and an XS Power D680 weighs less than 20lbs and doesn't cost more than a somewhat decent capacitor.




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    Re: Capacitor for better SQ?

    super caps are superior to extra batteries for car audio and will help maintain the alt output while extra batteries will only help maintain their float voltage. but a super cap bank is 500F or higher. the standard 1-5F caps you see are useless.

    but supercaps are also much more expensive - $65 each and you need banks of 6 in series (they are 2.5V-2.7V each).



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    Re: Capacitor for better SQ?

    Quote Originally Posted by trumpet View Post
    A standard "stiffening" capacitor will have a voltage drop, so that isn't going to raise your voltage above 13.8. What power wire do you have and how many runs?
    Why would a capacitor produce a voltage drop?




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    Re: Capacitor for better SQ?

    Because the cap immediately (and somewhat violently) recharges after it discharges which therefore causes a drop, unlike a battery which slowly evens out. This is also why you need a resistor or 12V light to charge the capacitor initially, otherwise you could fry the wiring or do serious damage to the capacitor.




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    Re: Capacitor for better SQ?

    Quote Originally Posted by bubbagumper6 View Post
    Why would a capacitor produce a voltage drop?
    Look up ESR.




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    Re: Capacitor for better SQ?

    Ok, I was thinking about doing the Rockford 10 farad mainly for looks and to help the interior lights from dimming. I'm thinking a cap might be easier than another battery since the battery should be the same type and age as the one in front



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    FI Q 15 Sealed 2.5 cu. ft

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    Re: Capacitor for better SQ?

    Quote Originally Posted by AndrewHD View Post
    Ok, I was thinking about doing the Rockford 10 farad mainly for looks and to help the interior lights from dimming. I'm thinking a cap might be easier than another battery since the battery should be the same type and age as the one in front
    Big 3 for dimming,and a 2nd battery(gel-cell) with 2 runs of 1/0 wiring would do much better then the Eye Candy(cap).lol



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    Re: Capacitor for better SQ?

    Quote Originally Posted by jrouter76 View Post
    Big 3 for dimming,and a 2nd battery(gel-cell) with 2 runs of 1/0 wiring would do much better then the Eye Candy(cap).lol
    The big three will not always solve light dimming without reserve power. Actually often times it may make it worse because it allows your amps to draw more current and taxes the rest of your electrical system harder. but yes with those three things your much better off. Battery doesn't necessarily have to be a gel but at least go with AGM





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    Re: Capacitor for better SQ?

    Quote Originally Posted by winkychevelle View Post
    Bank of 6 supercaps wired in series will help
    Quote Originally Posted by keep_hope_alive View Post
    super caps are superior to extra batteries for car audio and will help maintain the alt output while extra batteries will only help maintain their float voltage. but a super cap bank is 500F or higher. the standard 1-5F caps you see are useless.

    but supercaps are also much more expensive - $65 each and you need banks of 6 in series (they are 2.5V-2.7V each).
    ^Yes
    Either go super caps or forget about it. But do your research first.




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    Re: Capacitor for better SQ?

    Quote Originally Posted by trumpet View Post
    Look up ESR.
    I don't see how ESR applies to this discussion of voltage drop at all. Capacitors are not installed in series with the power feed. They are installed in parallel across the power terminals. In general, across the operating freq range of the cap, ESR will increase at lower frequencies and decrease at higher frequencies up to the self-resonant frequency of the cap. Once charged the capacitor creates no DC load on the system, and very little additional dynamic load (compared to the amp and sub).

    I don't follow the argument that a cap causes voltage drop. That said, I don't use caps in my sub installs, so I'm not an expert. Would love to hear a better explanation and see some measurements of actual voltage drop caused by cap installs.




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