I have recently sold my RX-8. Before I sold it though I took out the custom stereo system that I had installed in it. The system consisted of a 10" Kicker Solo-Baric subwoofer, a metal grill for the sub, a JBL amplifier, a power capacitor, and a custom made box for the sub. The box was made of 3/4" MDF and wrapped in black leather. It fits perfectly into the well in the truck. It looks and sounds amazing. The entire system cost me over $2,000. I will sell the entire system for $1,000. If you are only interested in the sub and box together I will sell that for $550.