Bowers & Wilkins ASW610 Specifications

Active Closed-Box Subwoofer System.
ASW610's sealed enclosure keeps the bass good and tight (and exciting!).
5-Year Warranty Valid from the date of purchase for passive loudspeakers.
ASW610 is compact, making it a subwoofer you can squeeze in anywhere. Or maybe use two for more bass control?
ASW610's long-throw 250mm driver allows it to move the large volumes of air needed for high-quality low-frequency output, and its audiophile-standard amplifier keeps the compact unit running cool.
Technical Features - Input Level (line in), Input Level (Speaker in), Low-Pass Filter Frequency (line in only),Low-Pass Filter Bypass, Bass Extension, Bass Roll-Off Alignment, Auto Sense On / Standby, Phase Switch.