{"product_id":"dd-audio-21-usa-built-dual-1-ohm-4-voice-coil-3200-watt-rms-subwoofer-9921c-copy","title":"DD Audio 18\" USA Built Dual 1-Ohm 4 Voice Coil 3200-Watt RMS Subwoofer 9918C","description":"\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003cdiv class=\"product-block\n            product-block--title\n            product-block--first\"\u003e\n\u003ch2 class=\"product-title\"\u003eDD Audio 18\" USA Built Dual 1-Ohm 4 Voice Coil 3200-Watt RMS Subwoofer 9918C\u003c\/h2\u003e\n\u003cdiv class=\"tab-panel\" tabindex=\"0\"\u003e\n\u003cul\u003e\n\u003cli\u003eHigh Power Handling: 3200W RMS and 9600W peak for competition-level performance.\u003c\/li\u003e\n\u003cli\u003eDual 1-Ohm Configuration: Designed for powerful, efficient amplifier setups.\u003c\/li\u003e\n\u003cli\u003eInnovative Cooling Technology: Aluminum Dual Stage Heatsink and Free Flow Cooling System ensure optimal heat dissipation.\u003c\/li\u003e\n\u003cli\u003eSuperior Build Quality: Handcrafted non-pressed carbon fiber-loaded pulp cone for strength and sound clarity.\u003c\/li\u003e\n\u003cli\u003eAdvanced Surround Design: 2nd Gen V-ROM surround enables extended cone movement and deep bass.\u003c\/li\u003e\n\u003cli\u003eHandcrafted in the USA: With premium materials for a high-end, audibly distinguishable listening experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDD Audio 18\" USA Built Dual 1-Ohm 4†Voice Coil 3200-Watt RMS Subwoofer 9918C\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Listing Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(1) DD Audio 18\" 1-Ohm, 3200 RMS\/9600 Peak USA Built Subwoofer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe DD Audio 9900C Series 18-inch subwoofer takes bass performance to the next level, blending advanced engineering with premium materials for exceptional sound quality. Designed for competition and high-performance car audio systems, it delivers 3200W RMS and handles bursts exceeding 9600W with ease. Featuring the aluminum Dual Stage Motor Heatsink, USA-made Iron Cloth Spider System, and the innovative 2nd Gen V-ROM surround, this subwoofer ensures superior cooling, durability, and extended excursion. Its supercharged motor generates nearly 9000 gauss, driving an 8-layer coil to achieve unmatched control and precision. The non-pressed carbon fiber-loaded pulp cone is lightweight, strong, and handcrafted in the USA for an audibly superior listening experience. Perfect for large ported enclosures, the 9900C delivers uncompromising bass power and accuracy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNEW Aluminum 2 Stage Motor Heatsink\u003c\/li\u003e\n\u003cli\u003e260mm Magnet Diameter\u003c\/li\u003e\n\u003cli\u003eMulti-Vent Free Flow Cooling Motor\u003c\/li\u003e\n\u003cli\u003eShorting Ring Motor\u003c\/li\u003e\n\u003cli\u003e4.3†High-Temp Voice Coil\u003c\/li\u003e\n\u003cli\u003eExcursion Optimized ESP Frame\u003c\/li\u003e\n\u003cli\u003eV-ROM Vario-Density Surround\u003c\/li\u003e\n\u003cli\u003eNon-Pressed Composite Reinforced Pulp Cone\u003c\/li\u003e\n\u003cli\u003e11†Dual\/Triple Layer Iron Cloth Spider\u003c\/li\u003e\n\u003cli\u003eLaminated Tinsel Leads\u003c\/li\u003e\n\u003cli\u003eHand Laid Composite Dust Cap\u003c\/li\u003e\n\u003cli\u003eEmbossed DDesign Magnet Boot\u003c\/li\u003e\n\u003cli\u003eMade In USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpeaker Size: 18 inches\u003c\/li\u003e\n\u003cli\u003eWatts RMS: 3200\u003c\/li\u003e\n\u003cli\u003eWatts Peak: 9600\u003c\/li\u003e\n\u003cli\u003eImpedance: Dual 1-ohm\u003c\/li\u003e\n\u003cli\u003eVoice Coil Diameter (VCD): 4 inches\u003c\/li\u003e\n\u003cli\u003ePiston Diameter: 15.5 inches\u003c\/li\u003e\n\u003cli\u003eResonant Frequency (Fs): 26.24 Hz\u003c\/li\u003e\n\u003cli\u003eQms: 2.265\u003c\/li\u003e\n\u003cli\u003eQes: 0.5167\u003c\/li\u003e\n\u003cli\u003eQts: 0.4705\u003c\/li\u003e\n\u003cli\u003eVas: 161.9 liters\u003c\/li\u003e\n\u003cli\u003eXmech (Max Excursion): 60 mm\u003c\/li\u003e\n\u003cli\u003eXmax (Linear Excursion): 22 mm\u003c\/li\u003e\n\u003cli\u003eFrame Outer Diameter (OD): 18.25 inches\u003c\/li\u003e\n\u003cli\u003eFrame OD with Gasket: 18.5 inches\u003c\/li\u003e\n\u003cli\u003eMounting Diameter: 16.75 inches\u003c\/li\u003e\n\u003cli\u003eMounting Depth: 11.875 inches\u003c\/li\u003e\n\u003cli\u003eMotor Diameter: 10.3125 inches\u003c\/li\u003e\n\u003cli\u003eMotor Depth: 4.5625 inches\u003c\/li\u003e\n\u003cli\u003eWoofer Displacement: 0.46 cu. ft.\u003c\/li\u003e\n\u003cli\u003eRecommended Ported Enclosure: 5.0–6.0 cu. ft.\u003c\/li\u003e\n\u003cli\u003eShipping Weight: 89 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-block\n            product-block--custom-liquid\"\u003e\n\u003cdiv class=\"custom-liquid\"\u003e\n\u003cdiv class=\"product-sku\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"DD Audio","offers":[{"title":"Default Title","offer_id":44721235886114,"sku":"DD-9918C-D1","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/3472\/1600\/files\/1_55b65975-e41a-4488-b9fb-c0dd2124625c.webp?v=1767945514","url":"https:\/\/www.eastcaraudio.net\/products\/dd-audio-21-usa-built-dual-1-ohm-4-voice-coil-3200-watt-rms-subwoofer-9921c-copy","provider":"East Car Audio","version":"1.0","type":"link"}