<https://emaudio.com/product/sbn8-em-audio-8-inch-subwoofer/#product>
<http://schema.org/description>
"Specs.\r\n-Black Spider Nomex\r\n-Non-Pressed pulp cone\r\n-High roll stitch foam surround.\r\n-Black plastic poly dust cap.\r\n-2.0` 4 layer cca coil.\r\n-Aluminum Vented former\r\n-Double Stack 60oz Motor\r\n-Y35 Grade Ferrite\r\n-Center Pole vent\r\n-4 Direct vent cooling (bottom plate)\r\n-Bumped Backplate\r\n-Flat leads\r\n-Stamp steel basket\r\n-Durable powder coated white basket\r\n-10ga Terminals\r\n-Rubber Motor Boot (For protection)\r\n-White EM Audio Logo\r\n-Rated @ 400w RMS\r\n-Dual 4Ω Voice Coil\r\n\r\nBox Specifications.\r\n-0.30 cu Sealed\r\n-0.5-0.75 cu Ported @ 40hz\r\n\r\n&amp;nbsp;"
<https://emaudio.com/product/sbn8-em-audio-8-inch-subwoofer/>