Subwoofer Yamaha NS-SW210

Designed to maximize the potential of HD sound sources, this speaker series gives you everything you need to fully enjoy movies and music. Advanced YST II subwooferDesigned to reproduce the full, dynamic sound of HD sourcesElegant Yamaha Piano Black finish, plus choice of three other finishes to match diverse interiorSlim design matches flat-panel TVsLarge screw speaker terminalsAdvanced YST II (Yamaha Active Servo Technology II)Linear Port for smoother bass with less unwanted noiseThese speakers have a slim, elegant design that will perfectly match plasma monitors or flat-screen TVs.Advanced YST II for Awesome Deep BassYamaha's newly developed Advanced YST II (Yamaha Active Servo Technology II) combines negative-impedance and constant-current principles to drive the speaker cone with even tighter control than previously. Using Advanced Negative Impedance Converter (ANIC) circuits, this system dynamically optimizes effective speaker impedance to maintain excellent linearity. This means more stable and accurate low range response, not to mention higher sound pressure levels, for more natural and energetic bass reproduction. Linear PortAdvanced YST II produces rich bass sound, and the addition of a Linear Port reduces extraneous noise for even higher quality.The Linear Port helps to ensure smooth bass response, while minimizing extraneous noise. Other Notable Feafures Auto standby with sensitivity selector (High, Low and Off)