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Message: <blockquote data-quote="Sir Chadwick" data-source="post: 2558" data-attributes="member: 540637">A single voice coil sub only has one pos and neg hook up on it, duals have two seperate hookups and they are usually on opposite sides of the speaker basket,DVC subs give you the opportunity to vary the resistance that the amp sees, maybe allowing you to draw more power out of the amp,I.E. if you have a dual 4ohm sub, you can wire the voice coils in parallel to reach a resistance level of 2ohms, or you can wire them in series to reach 8ohms,with this amp you want you sub resistance to be atleast 4ohms, alpines will play 2ohms on the sub channel but it lessens the life of the amp, and as much as you paid for it, you want to have it for a while.</blockquote>

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