The subs I have installed in my car are 8-inch Aura Sound woofers. The model line is the RPM, not to be confused with the superior, but much more costly FORCE line. I bought these woofers because I wanted an inexpensive, competition grade subwoofer. I have not yet been disappointed. Click here to view the Specs of the woofer.

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I have two woofers installed in a sealed box, each having about .85 cubic feet of airspace, and the boxes filled with polyfill. The subs have excellent low-end response, and are very quick, and accurate. I love the detail that smaller woofers produce. I built the box myself, and it fits snug in the trunk, and does not take up too much space, although I wish I could use my 60-40 split seats to carry my snowboard through them. I am thinking of replacing the two woofers with one bigger one, but that is only a dream right now. Click here for a close-up of the Sub

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On the back of the box, I built an amp rack, to hold both of my amps, and my electronic crossover. The whole system is wired using 4 gauge wire for maximum current flow. I am thinking of buying a Capacitor, but right now, I am not sure that it is necessary.