{"product_id":"dd-audio-21-usa-built-dual-2-ohm-4-vc-3200-w-rms-subwoofer-9921c-black-open-box","title":"DD Audio 21\" USA Built Dual 2-Ohm 4 VC 3200-W RMS Subwoofer 9921C Black OPEN BOX","description":"\u003cul\u003e\n\u003cli\u003eImpressive Power Handling: 3200W RMS, 9600W peak for extreme bass output and efficiency.\u003c\/li\u003e\n\u003cli\u003eInnovative Cooling: Aluminum 2-stage motor heatsink and multi-vent Free Flow Cooling system for heat dissipation.\u003c\/li\u003e\n\u003cli\u003ePrecision Excursion: 2nd Generation V-ROM and EROM surrounds for extended cone travel and minimal distortion.\u003c\/li\u003e\n\u003cli\u003eDurability and Control: 4.3-inch high-temp voice coil with a supercharged 9900 motor for tight, controlled bass.\u003c\/li\u003e\n\u003cli\u003eEnhanced Cone Area: Composite cone with 2nd generation EROM high-roll surround for more efficient air movement.\u003c\/li\u003e\n\u003cli\u003eDual 2-Ohm Configuration: Perfect for flexible amplifier matching and enhanced performance.\u003c\/li\u003e\n\u003cli\u003eHandcrafted in the USA: Made with premium materials for exceptional sound quality and durability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eDD Audio 21\" USA Built Dual 2-Ohm 4 VC 3200-W RMS Subwoofer 9921C Black OPEN BOX\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003e*This is the Black Carbon Fiber Cone version of the subwoofer*\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eIn perfect working condition\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eHas been mounted\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eSmall scratches all around and under the magnet.\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eMotor's rubber boot a bit bent.\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eBox has been opened.\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eOpen-box items are not subject to returns. They are sold \"As Is\". All requests for returns will not be accepted.\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\n\u003cp\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\" 2-Ohm, 3200 RMS\/9600 Peak USA Built Subwoofer\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 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\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  \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\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  \u003cli\u003eShipping Weight: 92 lbs\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e","brand":"DD Audio","offers":[{"title":"Default Title","offer_id":50086972424440,"sku":"DD-9921C-D2-OPEN-7514","price":999.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0029\/9384\/8365\/files\/a9a85fdd65e46fc7b396b3805d20c0dd93c7676a5411acfcd418b1cf0cf8a22d.jpg?v=1785512081","url":"https:\/\/bigjeffaudio.com\/products\/dd-audio-21-usa-built-dual-2-ohm-4-vc-3200-w-rms-subwoofer-9921c-black-open-box","provider":"Big Jeff Online Inc","version":"1.0","type":"link"}