Yamaha YST SW215PN 8 Inches Powered Subwoofer Piano Black

Yamaha's Advanced Active Servo Technology is a complementary amplifier/speaker system utilizing negative impedance feedback in the amp and a Helmholtz resonator in the speaker to provide strong and accurate bass. High amplifier power assures enough power to deliver shattering movie theater-like bass effects, and the down firing 8-inch cone driver translates the power into clear bass sound. The YST-SW215 has a frequency range of 30 to 200 Hz. Yamaha's BASS (Bass Action Selector Switch) tailors the sub's output for video or music at the touch of a switch. A Yamaha technology that uses a down firing driver to radiate the bass output more efficiently. Sound is radiated in all directions for greater impact. The user adjustable continuously variable high-cut filter sets the highest frequency the subwoofer will deliver. It can be set anywhere from 50 to 150 Hz. This allows the sub's output to be matched to the other speakers in the system and the room's acoustics for a seamless presentation. 150W subwoofer for music or video, available in a beautiful Piano Black finish.