Yamaha YST-SW105 Subwoofer. Excellent condition. Gently used and will be shipped in original box. About the subwoofer: ADVANCED ACTIVE SERVO TECHNOLOGY 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 from small speakers. 8-INCH DRIVER AND 100 WATT AMPLIFIER High amplifier power assures enough power to deliver movie theater-like bass effects and the 8-inch spruce cone driver translates the power into clear bass sound. The YST-SW105 has a frequency range of 30 to 200 Hz. FRONT PANEL CONTROLS Front panel controls make it easy to see the settings and make adjustments when necessary. VERSATILE SLIM-LINE DESIGN The new YST-SW105 is a slim-line design measuring only 9-1/4" wide. The sub can be positioned either vertically or horizontally. BASS SELECTOR Yamaha's BASS selector tailors the sub's output for video or music at the touch of a switch. MAGNETIC SHIELDING The subwoofer is magnetically shielded so it can be placed near a TV monitor or receiver without fear that it will degrade the picture. CONTINUOUSLY VARIABLE HIGH-CUT FILTER* 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. For instance, if the filter is set at 75 Hz, only frequencies 75 Hz or below will be delivered by the subwoofer. 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. VOLUME CONTROL The volume control permits the perfect matching of the sub's output to the overall volume of the system. SIGNAL SENSING ON/OFF For convenience, the YST-SW105 has a signal sensing circuit. When the subwoofer detects an audio signal, it turns its power on. When it senses no signal for several minutes, it shuts itself off. The sub also has a manual override. DUAL INPUTS Two sets of inputs allow the versatile subwoofer to accept either line level or speaker level input signals. HEAVY-DUTY SPEAKER TERMINALS Yamaha's three-way speaker terminals accept banana plug and a variety of other connectors, as well as speaker wire. BLACK FINISH Handsome black ash finish blends in with room decor. RIGID MDF CONSTRUCTION The YST-SW105's cabinet is constructed of HQ-MDF to increase rigidity and reduce vibration and resonance.