The Pyle Pro PASW18 passive stage subwoofer is loaded with a Genuine Pyle Driver, so you know this subwoofer system has been assembled with the highest quality components. This speaker features Heavy Duty MDF (Medium-Density Fiberboard) construction with reinforced corners, Heavy Duty handles, and a vinyl wrapped enclosure, giving it the ability to withstand years of use and abuse, whether it be at live stage gigs, private parties, traveling DJ events, etc. The PASC18 features one 18'' Pyle Premium Woofer in a specially designed ported bass reflex enclosure which provides extended low frequency output. The 18'' Woofer features a 100 oz. magnet and a 3'' Kapton Voice Coil, for excellent signal response and precision reproduction of low end frequencies. If you are looking to put together a professional PA system at an affordable price, make Pyle Pro a top choice. Pyle has been in business for over 35 years, and their manufacturing experience and expertise is easy to see - and hear.