Polk Audio PSW10 10-Inch Powered Subwoofer (Single, Black) Single 10-inch subwoofer in black with built-in high-current amplifier for big bass Equipped with one 10-inch polymer-composite dynamic-balance cone driver. Line- and speaker-level inputs and speaker level outputs allow easy connection to any system Laser-based Klippel measurement technology for improved linearity and deep, precise sound. Low-Pass Crossover Frequency : 80-160 Hz Non-resonant all-MDF enclosure construction with 0.75-inch-thick baffles and internal bracing. Amplifier Continuous Power - 50 watts.Amplifier Dynamic Power - 100 watts Measures 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)