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Upgraded alternator vs. battery vs. capacitor?
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<blockquote data-quote="ckunke002" data-source="post: 7576626" data-attributes="member: 637083"><p>I have a 2009 Subaru WRX. I have no idea what the alternator puts out (is it watts or amps or volts?) I imagine it's a pretty standard factory alt. I currently have a 300 watt Rockford Fosgate and I'm about to buy a Hifonics Brutus BRZ1200.1D which is 900 watts at 2 ohm's and I will hook it up to 2 4-ohm JL 12 inch subs that are 500 watts RMS. It should power them both at 450 watts.</p><p></p><p>For my situation, do I truly need a new H/O alternator, or will I be okay with just another battery in the trunk then hooking that battery up to my amps? I've also heard that you absolutely need to have 2 of the same type of battery if you install a 2nd one, so will I need to change my battery under the hood as well so that they're matching?</p><p></p><p>I will do the Big 3 regardless. It's a really easy and practical upgrade</p></blockquote><p></p>
[QUOTE="ckunke002, post: 7576626, member: 637083"] I have a 2009 Subaru WRX. I have no idea what the alternator puts out (is it watts or amps or volts?) I imagine it's a pretty standard factory alt. I currently have a 300 watt Rockford Fosgate and I'm about to buy a Hifonics Brutus BRZ1200.1D which is 900 watts at 2 ohm's and I will hook it up to 2 4-ohm JL 12 inch subs that are 500 watts RMS. It should power them both at 450 watts. For my situation, do I truly need a new H/O alternator, or will I be okay with just another battery in the trunk then hooking that battery up to my amps? I've also heard that you absolutely need to have 2 of the same type of battery if you install a 2nd one, so will I need to change my battery under the hood as well so that they're matching? I will do the Big 3 regardless. It's a really easy and practical upgrade [/QUOTE]
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