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    JL12W7INAGS300's Avatar
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    Lights dimming from 500 watts?

    I just installed a JL 500/1 Amp with a JL 12 W7 in a ported box in my lexus GS300. The battery is not stock, but it has the same specs as a stock battery. I used 4 gauge JL wire. When the sub hits the hardest, my lights have a slight but noticiable dim. What should I do about this? I am planning on getting a 1000/1 soon because the sub isn't hitting as hard as I would like. Thanks!







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    Re: Lights dimming from 500 watts?

    check the grounds and alt



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    Re: Lights dimming from 500 watts?

    To produce 500W with an 80% efficiency, the amp will draw about 45A @ 14V. Chances are that your alt doesn't have that kind of headroom, first, and it needs time to adjust its output, second, and the amp isn't that efficient, third. Depending on current draw, you can dim the lights with a lot less power than that. First thing is to make sure that your charging system is healthy. If you want to go to up to a 1000/1 you should be shopping for a bigger alt, as well. Adding a battery with a high surface voltage might help a little with the dimming from there as might a good sized cap.



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    Re: Lights dimming from 500 watts?

    Get a capacatator to help out the battery




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    Re: Lights dimming from 500 watts?

    Capacitor**




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    Re: Lights dimming from 500 watts?

    A capacitor won't help...probably would hurt.




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    Re: Lights dimming from 500 watts?

    Why do you say that?




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    Re: Lights dimming from 500 watts?

    because they are not very efficient and yes they stablize voltage but at lower then what you want.



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    Re: Lights dimming from 500 watts?

    Because in most cases capcitors are useless for power stiffening purposes...and they create an extra load on the charging system of the car. The only decent caps for power stiffening purposes are those with Low ESR and ESL




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    Re: Lights dimming from 500 watts?

    Alright, makes sense.




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    Re: Lights dimming from 500 watts?

    Quote Originally Posted by Blunt
    because they are not very efficient and yes they stablize voltage but at lower then what you want.
    my mobile spec 3 farad cap is consistantly 13.8-14.2v with techno on, music at low volumes its up to 14.4 so for that reason i must disagree. not trying to start an argument just sharing my results.

    Caps are deffinately not an alternative to HO alts. If your stepping up toa 1000/1 you should deff look into an HO Alt.



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