Wondering if this is going to need an extra battery or not?

[usnspeed90]

A 1750w rms sub, with a 1900w amp. I am going to be using one of the 'big 3 upgrade kits" and a 15 farad capacitor. I was wondering if I would still need an extra battery or not?

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[ultimate157 5,000+ posts]

What kind of vehicle? How big is your stock alt? How big is your stock battery?

 

[usnspeed90]

2013 mazdaspeed 3. I'm finding that the alternator is rated at 125 A, and the battery is 14V but not absolutely sure.

 

[CrossoverOre 10+ year member]

ditch the cap and get this instead or something like it. Stinger Electronics | Product Details