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Message: <blockquote data-quote="aggybong" data-source="post: 4897523" data-attributes="member: 558021">My Alpine 9830 has the following option for subwoofers:I notice that with it set to reverse (180 degrees), and the sub firing into the back of the car (towards the trunk), it sounds much better (louder). With it set to normal, I can barely hear the sub.I am moving to a new car, a Mazda6, and have decided to keep the stock headunit and maybe throw on a Cleansweep to even out the frequencies. However, I won't have the phase selector any more, and I'm worried about the subwoofer sounding poorly because of it.Is there a way to wire it so it's reverse, or is that a special headunit feature?</blockquote>

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