I have purchased a 15 inch 800rms DVC sub and the guy in the shop told me to wire the voice coil output on one side of the sub to the voice coil output on the other side of the sub, then you only have 1 pos and 1 neg goin to the amp. Can i wire both positives and both negatives to the amp so im usein all four ohms. my amp is a digital mono 1000rms pro audio. which way will give me more power.