Need help getting more power

I have an XTR 4000.1D 8000 watts, and I need more power, can I use aXS Power D7500 12V AGM Battery (Max Amps 6,000A, CA: 1700, Ah: 140, 5000W / 7500W) and and aftermarket alternator will that fix my problem?

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@pannell "I need more power" where? Your amp? Give us more information about what you are working on and what you are thinking about with this.

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@oldturkey03 I had an audio system installed in my car, but my cars stock alternator and battery itself is not giving the power I need! Every time the bass hits my lights dim with the hit of the bass! Also I need more power to the amplifier to make my subs hit harder, because I'm not getting the full potential of the subwoofers I had installed

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@pannell what vehicle are we talking about?

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@oldturkey03 its a 2015 GMC Yukon

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@pannell something went wrong with this question. The spam filter captures your comments and reads those as Spam. Check on here https://www.ifixit.com/User/Activity/174... I will notify the proper people on ifixit that can take care of this. I've read your comment about the caps and will get back with you on my answer. Give me a bit of time.

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@pannell regardless of what vehicle you have, you do want to make sure that your wiring is clean and tight on the terminals and the battery. You could go with a higher amperage alternator but that may not fix it completely due to the spikes in power demand. This will of course depend on your vehicle and which alternators are available. I'd suggest you add a capacitor to your vehicles sound system as well. The cap would smoothen out the power spikes. It should prevent those spikes that draws from your electrical system. Rule of thumb is 1 Farad per 1000W RMS

Update (10/01/2016)

This site should help you how to conect the caps(s). Brax, Boss, Alumapro and Fosgate have a couple of decent size caps that are meant for this purpose.

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Is there a certain type of capacitor or brand that you would recommend, I'm oblivious to this audio world! Also thanks for your time and imput

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Is there a certain brand/type of capacitor that you would recommend? I'm oblivious to this audio equipment and wattage, also would like to thank you for your time and imput!

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