Polk Audio PSW10 10-Inch Powered Subwoofer (Single, Black) Single 10-inch subwoofer in black with built-in high-current amplifier for big bassEquipped with one 10-inch polymer-composite dynamic-balance cone driverLaser-based Klippel measurement technology for improved linearity and deep, precise soundNon-resonant all-MDF enclosure construction with 0.75-inch-thick baffles and internal bracing. Amplifier Continuous Power - 50 watts.Amplifier Dynamic Power - 100 wattsMeasures 14 by 14.38 by 16.12 inches (WxHxD)Polk Audio loudspeakers and subwoofers are capable of playing at extremely high volume levels. You should limit prolonged exposure to volumes that exceed 85 decibels(dB). Product Description: PSW10 fills in the bottom end of your home theater system. Relieve your main speakers from performing bass duty and let them work on the mids and highs. PSW10 is a great addition to any subwooferless system and will bring your movie watching experience to the next level. All woofers feature a floor coupled downward firing port. This configuration brings you maximum bass impact while keeping the front of the cabinet as low profile as possible. All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime. The voltage of the item is Standard US Voltage 120 volts.