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How am I supposed to wire it. A friend of mine tried wiring it as he normally wires his system but it dindt work properly because the subwoofer was burping. But we did this with the sub not being in a box. Would it go away once I place it in a box and try it out? Or is the sub malfunctioning and should I get the warranty done on it? He wired it as a series not as parrallel would that have helped? Email me at Branavan.muralee@gmail.com if you can help please. Thanks a lot.