AIYIMA 8 Inch Subwoofer Speaker Woofer 4 8 Ohm 150W High Power Long Stroke Deep Bass Hifi Sound Loudspeaker DIY For Home Theater|Bookshelf Speakers| - AliExpress
JBL Grand Touring GT1281 12" 8-ohm Component Subwoofer at Crutchfield
Amazon.com: Earthquake Sound PRO-X188 18-inch Pro-X Series 8-Ohm Die Cast Subwoofer (Single) : Everything Else