New member here, with a request for opinions. As the title says I'm going to be installing a Polk mm100 10" Subwoofer in the cockpit of my Four Winns Horizon 200 bowrider. I'll be powering it with a bridged 160W RMS. I know that from an acoustical perspective boats are a mess, still I'm wondering if I'd be better off downfiring the 10", or direct firing it. I will be building a sealed box to the recommended .66 cubic foot volume. Thoughts?