{"product_id":"dd-audio-9921c-d1-supercharged-21-3200w-rms-dual-1-ohm-usa-built-subwoofer","title":"DD Audio 9921C-D1 SuperCharged 21\" 3200W RMS Dual 1 Ohm USA Built Subwoofer","description":"\u003cul\u003e\n\u003cli\u003eSUPERCHARGED MOTOR: A neodymium ring focuses magnetic energy into the voice coil gap for 20 to 25% more usable motor strength and tighter cone control.\u003c\/li\u003e\n\u003cli\u003eSAME 3200 WATT RMS RATING: Handles the same power as the standard 9921C, so the extra control comes without changing your amp requirements.\u003c\/li\u003e\n\u003cli\u003eMORE CONE, LESS TRAVEL: Up to 30% more cone area than a typical 18\" lets it move big air with less coil movement.\u003c\/li\u003e\n\u003cli\u003eKEEPS COOL UNDER LOAD: A two-stage aluminum heatsink and vented Free Flow motor pull heat away during long, hard sessions.\u003c\/li\u003e\n\u003cli\u003eMADE FOR BIG PORTED BOXES: Designed for 6.0 to 8.0 cu. ft. ported enclosures in high-output builds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eDD Audio 9921C-D1 SuperCharged 21\" 3200W RMS Dual 1 Ohm USA Built Subwoofer\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eThis Listing Includes:\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cbr\u003e\n  \u003cli\u003e(1) DD Audio 21\" Subwoofer 9921C-D1\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003cp\u003eThe DD Audio 9900C Series 21-inch subwoofer is a powerhouse designed for those who demand deep, thunderous bass with unmatched efficiency. With an RMS rating of 3200W and a peak power handling of 9600W, this subwoofer is engineered to deliver the ultimate performance. The 9900C's large ferrite motor series is built to provide exceptional sound clarity and power, even with intense power bursts over 12,000W. Utilizing cutting-edge technologies like the aluminum Dual Stage rear-mounted heatsink, USA-made Iron Cloth Spider System, and 2nd generation V-ROM surround, the 9900C ensures high efficiency, durability, and superior sound. The 9921 model expands on these features with a composite cone and 2nd generation EROM surround, offering up to 30% more cone area than typical 18\" subwoofers. The result is more efficient air movement with less coil travel, providing an unbeatable audio experience. Perfect for high-output ported enclosures, this subwoofer is made to move air and produce the deepest bass with precision.\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cbr\u003e\n  \u003cli\u003eNEW Aluminum 2 Stage Motor Heatsink\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003e260mm Magnet Diameter\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eMulti-Vent Free Flow Cooling Motor\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eShorting Ring Motor\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003e4.3” High-Temp Voice Coil\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eExcursion Optimized ESP Frame\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eV-ROM Vario-Density Surround\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eNon-Pressed Composite Reinforced Pulp Cone\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003e11” Dual\/Triple Layer Iron Cloth Spider\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eLaminated Tinsel Leads\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eHand Laid Composite Dust Cap\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eEmbossed DDesign Magnet Boot\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eMade In USA\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cbr\u003e\n  \u003cli\u003eSpeaker Size: 21 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eWatts RMS: 3200\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eWatts Peak: 9600\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eImpedance: Dual 1-ohm\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eVoice Coil Diameter (VCD): 4 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003ePiston Diameter: 18.25 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eResonant Frequency (Fs): 26.24 Hz\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eQms: 5.265\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eQes: 0.517\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eQts: 0.471\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eVas: 161.9 liters\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eXmech (Max Excursion): 92 mm\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eXmax (Linear Excursion): 22 mm\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003cp\u003e\u003cem\u003eSuggested Enclosure Specifications\u003c\/em\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cbr\u003e\n  \u003cli\u003eWoofer Displacement: 0.55 cu. ft.\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eRecommended Ported Enclosure: 6.0-8.0 cu. ft.\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eDiminssions:\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cbr\u003e\n  \u003cli\u003eFrame Outer Diameter (OD): 21.3125 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eFrame OD with Gasket: 21.3125 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eMounting Diameter: 19.25 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eMounting Depth: 11.3125 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eMotor Diameter: 10.3125 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eMotor Depth: 4.5625 inches\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eShipping Weight: 92 lbs\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003cp\u003eIf you want the most cone area in the 9900 lineup with even more motor control, the SuperCharged 9921C is the one to grab.\u003c\/p\u003e","brand":"DD Audio","offers":[{"title":"Default Title","offer_id":67972311318776,"sku":"DD-9921C-D1-SC","price":1129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0029\/9384\/8365\/files\/70b3f803944ce3de4a465aecb4177e0fb84200256329333a1b980e64e54a0242_80687806-28e6-4d7f-9819-b0ec51837e4a.jpg?v=1793807526","url":"https:\/\/bigjeffaudio.com\/products\/dd-audio-9921c-d1-supercharged-21-3200w-rms-dual-1-ohm-usa-built-subwoofer","provider":"Big Jeff Online Inc","version":"1.0","type":"link"}