High Power 6.5 Inch Subwoofer Speaker 8 Inch Audio Speaker With 80W Power And 4.8 Ohm Volume Perfect For DIY Bookshelf Sound System And Fever Woofer Music Loudspeaker With From Youareme, $122.11 | DHgate.Com
WF681.5 6" 8 ohm Replacement Woofer – Bazooka
Rogue Car Audio Vandal 6.5 | 400 WATT 6.5 inch Subwoofer - D2 - Down4Sound Shop