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<blockquote data-quote="Lasherž" data-source="post: 8703713" data-attributes="member: 679555">What vehicle do you currently have? Stock alternators are usually able to keep up with that much of a demand in my experience. I would expect maybe some headlight dimming, but it sounds like either your alternator is pulling too hard on your drive belt or your battery is on death&#039;s doorway.That being said, assuming your problem is caused solely by lack of power I&#039;d say getting a HO alt is the more effective solution long term that you won&#039;t regret. While getting a higher quality battery will be expensive for a less long-lived part and your charging system will still have to deal with the heightened demand of the amplifiers regardless. It&#039;s perhaps worth looking into getting a second standard battery before a yellow top unless space is your primary concern, as that&#039;s the more economic way to deal with a higher amperage draw than your primary battery can handle.With capacitors it&#039;s possible that it would address your immediate issue but while it would improve things from your alternator&#039;s perspective, it&#039;s only for very special cases where it&#039;s teetering on the edge of not being enough to handle the demand of the system with the resistance losses of charging a lead acid battery. Also capacitors are a very scammy business in car audio, I don&#039;t trust a lot of the farad values they list because they know getting testing equipment and know-how means you&#039;re willing to pay more than the cost the scammy ones are selling for. It&#039;s worth considering as well that if you&#039;re having issues without the additional amplifier then a cap is not nearly enough to address the situation.Bottom line: If you have the money, get both the HO and either yellow top or additional battery, but ultimately I&#039;m still most concerned that there&#039;s something wrong with the belt system if it&#039;s dragging your car&#039;s engine down enough to turn the music off. The engine should not be so phased by what sounds like a low amperage, like 90A load. Maybe more details from you will clear up why that&#039;s the case.</blockquote>

[QUOTE="Lasherž, post: 8703713, member: 679555"] What vehicle do you currently have? Stock alternators are usually able to keep up with that much of a demand in my experience. I would expect maybe some headlight dimming, but it sounds like either your alternator is pulling too hard on your drive belt or your battery is on death's doorway. That being said, assuming your problem is caused solely by lack of power I'd say getting a HO alt is the more effective solution long term that you won't regret. While getting a higher quality battery will be expensive for a less long-lived part and your charging system will still have to deal with the heightened demand of the amplifiers regardless. It's perhaps worth looking into getting a second standard battery before a yellow top unless space is your primary concern, as that's the more economic way to deal with a higher amperage draw than your primary battery can handle. With capacitors it's possible that it would address your immediate issue but while it would improve things from your alternator's perspective, it's only for very special cases where it's teetering on the edge of not being enough to handle the demand of the system with the resistance losses of charging a lead acid battery. Also capacitors are a very scammy business in car audio, I don't trust a lot of the farad values they list because they know getting testing equipment and know-how means you're willing to pay more than the cost the scammy ones are selling for. It's worth considering as well that if you're having issues without the additional amplifier then a cap is not nearly enough to address the situation. Bottom line: If you have the money, get both the HO and either yellow top or additional battery, but ultimately I'm still most concerned that there's something wrong with the belt system if it's dragging your car's engine down enough to turn the music off. The engine should not be so phased by what sounds like a low amperage, like 90A load. Maybe more details from you will clear up why that's the case. [/QUOTE]

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