{"product_id":"soundqubed-hdb2-12d4","title":"SoundQubed HDB2-12D4 12\" D4 HDB2 Series Sub, 2.0\" DVC, 450w\/900w","description":"\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e HDB2-12D4   \u003cstrong\u003eSold as:\u003c\/strong\u003e Each\u003c\/p\u003e\u003cp\u003eSoundQubed HDB2 Series Subwoofer 12 Inch 2.0\" DVC 450\/900 D4\u003c\/p\u003e\u003cp\u003eThe SoundQubed HDB2-12-D4 is a rugged 12” subwoofer crafted for deep, dynamic bass with precision and power. With dual 4-ohm voice coils and a 450w RMS \/ 900w peak rating, this subwoofer is built for strong performance and system flexibility. Its conical paper cone, PPI dust cap, and foam surround deliver tight, musical low-end, while the black aluminum 2” voice coil and spider-crossed leads ensure durability under heavy use. With an 87.5dB sensitivity and 20Hz–250Hz frequency range, the HDB2-12-D4 is ideal for ported or sealed enclosures in custom or competition-level setups where tight bass and consistent output are key.\u003c\/p\u003e\u003cp\u003eGeneral Specifications\u003cbr\u003eNominal Diameter: 12\" \/ 304.8mm\u003cbr\u003eNominal Impedance: 4+4 Ohms\u003cbr\u003eRMS Power Handling: 450W\u003cbr\u003eMAX Power Handling: 900W\u003cbr\u003eSensitivity (1w\/1m): 87.5dB\u003cbr\u003eFrequency Response: 20-250 KHz\u003cbr\u003eRecommended Low-Pass Crossover: 120 Hz\u003cbr\u003eFeatures\u003cbr\u003eImproved Heat Dissipation\u003cbr\u003eCone Shape: Conical\u003cbr\u003eSpeaker Terminals: Push 8Ga\u003cbr\u003eThiele \u0026amp; Small Parameters\u003cbr\u003eEquivalent Volume (Vas): 23.4L \/ 0.82ft³\u003cbr\u003eExcursion (one way) (Xmax): 7.75mm\u003cbr\u003eFree Air Resonance (Fs): 38 Hz\u003cbr\u003eMechanical Factor (Qms): 6.305\u003cbr\u003eElectrical Factor (Qes): 0.748\u003cbr\u003eTotal Factor (Qts): 0.69\u003cbr\u003eMechanical Mass (Mms): 189.648g\u003cbr\u003eMechanical Compliance (Cms): 0.069 mm\/N\u003cbr\u003eBL Factor (BL): 21.65\u003cbr\u003eVoice Coil Inductance (Le): 32.18 mH\u003cbr\u003eCone Area (Sd): 490.87 Cm²\u003cbr\u003eDC Resistance (Re): 3.2 + 3.2 ohms\u003cbr\u003eEfficiency Bandwidth Product (EBP): 50.8\u003cbr\u003eMeasurements\u003cbr\u003eOverall Diameter: 12.8\" \/ 325mm\u003cbr\u003eOverall Depth: 7\" \/ 178mm\u003cbr\u003eFront Mount Baffle Cutout: 11\" \/ 280mm\u003cbr\u003eMounting Depth: 6\" \/ 152mm\u003cbr\u003eMotor Diameter: 6.14\" \/ 156mm\u003c\/p\u003e","brand":"SoundQubed","offers":[{"title":"Default Title","offer_id":47640279777442,"sku":"HDB2-12D4","price":179.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0455\/3526\/4930\/files\/HDB2-12D4_lg.png?v=1789044737","url":"https:\/\/tdscaraudio.com\/products\/soundqubed-hdb2-12d4","provider":"TDS Car Audio","version":"1.0","type":"link"}