{"product_id":"dd-audio-9921c-d2-supercharged-21-3200w-rms-dual-2-ohm-usa-built-subwoofer","title":"DD Audio 9921C-D2 SuperCharged 21\" 3200W RMS Dual 2 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\u003eFLEXIBLE DUAL 2 OHM WIRING: Wire one sub to 1 or 4 ohms, or run two subs at 2 ohms or 0.5 ohm to match your amp.\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-D2 SuperCharged 21\" 3200W RMS Dual 2 Ohm USA Built Subwoofer\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\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\" Dual 2-Ohm SuperCharged Subwoofer 9921C-D2, 3200W RMS \/ 9600W Peak, USA Built\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e SuperCharged subwoofers are made to order by DD Audio. Please allow approximately 1 to 2 weeks for your sub to be built before it ships.\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003eThe DD Audio 9900C Series 21-inch subwoofer is built for people who want deep, heavy bass and a lot of air movement. It's rated at 3200W RMS with 9600W peak power handling. The 9900C's large ferrite motor is made for clean output and real power, backed by the aluminum Dual Stage rear-mounted heatsink, USA-made Iron Cloth Spider System, and 2nd generation V-ROM surround for efficiency and durability. The 9921 adds a composite cone with up to 30% more cone area than a typical 18\" sub. More cone area means it can move the same air with less coil travel, which helps it stay efficient and controlled. This sub is made for high-output ported enclosures.\u003cbr\u003e\u003cbr\u003e\nThis is the SuperCharged version. DD adds a specially shaped neodymium ring inside the motor that redirects magnetic energy into the voice coil gap, raising usable motor strength by about 20 to 25%. With a cone this size, that extra grip helps keep it tight and controlled across the whole power range. Power handling stays the same as the standard 9921C, so plan your amp around 3200 watts RMS.\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\u003eSuperCharged Motor with Neodymium Flux Ring\u003c\/li\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 (same as standard model)\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eWatts Peak: 9600\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eImpedance: Dual 2-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 (standard model)\u003c\/li\u003e\n\u003cbr\u003e\n  \u003cli\u003eQts: 0.471 (standard model)\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\u003cstrong\u003eSuggested Enclosure Specifications\u003c\/strong\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\u003eDimensions:\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":67972403036408,"sku":"DD-9921C-D2-SC","price":1129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0029\/9384\/8365\/files\/70b3f803944ce3de4a465aecb4177e0fb84200256329333a1b980e64e54a0242_69354360-e7af-4265-bdf5-c646ca0a32e3.jpg?v=1793808148","url":"https:\/\/bigjeffaudio.com\/products\/dd-audio-9921c-d2-supercharged-21-3200w-rms-dual-2-ohm-usa-built-subwoofer","provider":"Big Jeff Online Inc","version":"1.0","type":"link"}