It's time to finish up the installation on our '08 Road Warrior Class C motorhome/toy hauler. We finished the roof-mounted marine speaker installation last month, and now it's time to add some bass to complement the system. An Alpine SWR-1522D 15-inch Type R subwoofer was chosen for the task, housed in a custom-built ported enclosure. A single PDX-1.1000 mono subwoofer amp powers the subwoofer system. Follow along as we show you how to build this custom subwoofer enclosure and install it in the RV.