This is a complete package! Package includes . MTX loaded car subwoofer system with Mono amplifier and complete amplifier installation kit! The MTX TNE212D combines great subwoofer design with perfect enclosure design to deliver bass that far exceeds expectations. The unit is a dual 12″ sealed enclosure that has a single terminal cup showing a final 2O load to any connected amplifier. The Terminator subwoofers used in the enclosure include polypropylene dustcaps that are durable allowing them to survive the rigors of most trunks and are lightweight allowing them to efficiently move using less power. Each subwoofer can handle 200 watts RMS power . resulting in a power level of 400 watts RMS/800 watts Peak for the entire enclosure.