It is a 150 watt subwoofer which is one top rated subwoofer, and a perfect example that not all top brands have the monopoly of good quality subs. It is equipped with infinity’s Metal Matrix diaphragm driver. It is designed for fast delivery and giving a high bass. It’s fabulous feature is it’s bass is clear to hearing if our are at a high volume. This subwoofer is 18.5 inches x 13.8 inches and 22 inches in measures. And it is around 40 pounds in weight.