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Message: <blockquote data-quote="Master69" data-source="post: 6087869" data-attributes="member: 610558">ok guys i kinda need to know this..well right now i am looking at getting and 18 in sub maybe a fi btl 18, and if i did would i need to upgrade my battery and alternator? if i got a hifonics brutus that does 1600? i beleive i have a 80 amp alt and stock batt, i will definately do the big 3 so can anyone help me?EDIT: im looking at getting a FI BL 18 1000rms and putting a 100watt amp on it, if i do the big three would i need a new battery? or what if i got a new battery thats better than the one i have now? would i need an extra battery or alternator?</blockquote>

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