Dual ported for those who like the full surround-sound that having multiple subwoofers creates, this option from B. Box is all about giving you a solid, high-quality choice for your trunk. Meanwhile, the larger surface area allows for a greater quality of sound and the carpeting ensures a good vibe from your rock and pop.
You should be aware that some of the customers have noted that the ports can sometimes leak air, resulting in a shaky sound. This is directly related to the port sizing, however, which can sometimes run a little small (depending on your speaker). So, be sure to thoroughly get your measurements down before purchasing.