Yamaha's high-performance YST-FSW100 Advanced YSTII Subwoofer gives your bass the extra thump it needs when you're enjoying your favorite songs or movies. How does it deliver that? For starters, the new "Half Pipe" port design smoothes out the bass and minimizes unwanted noise. The advanced YST II technology drives the speaker cone with tighter control than before, giving you a more stable and accurate low-range response and more natural, energetic bass reproduction. The attractive, stylish design matches perfectly with the newest flat-screen monitors and plasma TVs. Dimensions(WxHxD) - 15 3/4 x 14 3/4 x 6 3/16 (400 x 375 x 157 mm) Weight - 19.8 lbs. (9 kg)