The Rockville RV12. 1C Single 12" 600 watt vented subwoofer enclosure is one of the best bass all-in-one subwoofer packages we ever carried. This package is better than others on the market. This system includes a top of the line ported enclosure which gives you more punchy and better sounding bass. The vents were strategically placed on the bottom of the enclosure and then the enclosure is placed at a 15 degree angle to fire the bass out hard and give you amazing sound quality. This package also includes a mono block bass amplifier vs. most packages that have a 2 channel stereo amplifier. This mono amplifier is built just for loud bass. The amplifier is CEA-2006 compliant so you can be 100% sure you will get the power you expect. This is one of the only packages on the market that is CEA-2006 compliant. Most brands are unable to do this because they inflate their power ratings. CEA-2006 compliant means that these are tested and rated by the same industry standards used by other famous brands like Kenwood, Sony, Kicker, etc. The subwoofers in this package are of superior quality. They feature high power 1. 5" aluminum 4-layer voice coils with bumped and vented magnet motor structures among other features.