Polk Audio PSW10 10-Inch Powered Subwoofer (Single， Black)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Single 10-inch subwoofer in black with built-in high-current amplifier for big bass </span></li><li><span class="a-list-item"> Equipped with one 10-inch polymer-composite dynamic-balance cone driver </span></li><li><span class="a-list-item"> Laser-based Klippel measurement technology for improved linearity and deep， precise sound </span></li><li><span class="a-list-item"> Non-resonant all-MDF enclosure construction with 0.75-inch-thick baffles and internal bracing </span></li><li><span class="a-list-item"> Measures 14 by 14.38 by 16.12 inches (WxHxD) </span></li><li><span class="a-list-item"> 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). </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51JGYWW4N4L.jpg" noproxy>