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Hey guys... I just replaced the headunit in my 2015 and I'm moving to the speakers next. The only thing I can't seem to find online is information on whether or not an extra battery is needed or recommended. Can any of you shed light for me?
 

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Not unless you are adding significant amplification (1000s of Watts total). I replaced my speakers with Infinity and a 300W 10in subwoofer and have no issues with the stock battery.
 
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