Yamaha YST-FSW150BL Advanced YST II Down-Firing Active Subwoofer<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Rack Mountable Design </span></li><li><span class="a-list-item"> Advanced YST (Yamaha Active Servo Technology II) </span></li><li><span class="a-list-item"> Down-firing active design </span></li><li><span class="a-list-item"> High 130W dynamic power </span></li><li><span class="a-list-item"> Linear port for minimizing extraneous noise </span></li><li><span class="a-list-item"> This item is non returnable </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31%2B%2BVVxXxXL.jpg" noproxy>