Yamaha NS-SW200PN 28-200 Hz 130W Powered Subwoofer<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>PWM digital drive high efficiency amplifier and dual feedback circuit</li><li>New Twisted Flare Port contributes to clear and tight bass</li><li>Advance YST II (Yamaha Active Servo Technology II) with 130 W output power</li><li>Front control panel for easy control， auto standby and system control</li><li>28-200 Hz Frequency response</li></ul></div><img src="http://ecx.images-amazon.com/images/I/412F6XIRjuL.jpg" noproxy>