Includes 2 White Definitive Technology Descend DN10 10 Inch Subwoofers. Descends unique 3XR Architecture provides triple the bass producing surface area of a traditional ported subwoofer. This extra surface area moves more air, resulting in massive low end. And because 3XR doesnt use ports, it also provides crystal clear sound with no port noise distortion. As the core technology behind Descends 3XR Architecure, its passive bass radiators enable the DN10 to play as loud and low as a 12 Inch ported sub without unwanted port noise distortion. Passive radiators also deliver a smooth frequency response like a sealed sub, but with the port like ability to play louder and lower in a smaller enclosure. The DN10 is equipped with a 500 watt peak custom Class D digital amplifier, designed to get the most out of the DN10s 3XR Architecture. This custom amplification provides the DN10 enough power and efficiency to play as low as 28Hz without taking up a ton of space. Manually adjust DN10s variable volume, low pass filter, and phase so it always sounds perfect within your system. When two or more subwoofers are properly employed throughout the room, sound waves disperse more evenly, flattening the frequency response. The result is smoother bass throughout the room, helping to eliminate boomy locations or dead spots.