{"product_id":"alpine-r2-w12d4-12-r-series-r2-subwoofer-dual-4-ohm-750-watt-rms-copy","title":"Alpine R2-W8D2 8\" R-Series \"R2\" Subwoofer, Dual 2-Ohm, 350 Watt RMS","description":"\u003carticle class=\"productView-description\" id=\"productDescription\"\u003e\n\u003ch1 class=\"productView-title\"\u003eAlpine R2-W8D2 8\" R-Series \"R2\" Subwoofer, Dual 2-Ohm, 350 Watt RMS\u003c\/h1\u003e\n\u003ch3\u003eR-Series Type R2 8-inch Subwoofer 2+2 ohms\u003c\/h3\u003e\n\u003cdiv id=\"description\"\u003eThe new R-Series subwoofers now feature larger, double-stacked magnets that contribute more motor force for deeper bass and tighter bass control. An integrated Faraday ring minimizes distortion for cleaner bass output. A Kevlar-treated cone ensures durability in the subwoofer for reliable performance, even at high volumes. A new Polypropylene\/ceramic composite dust cap ensures rigidity while also providing incredible internal damping. The new R-Series subwoofers contain a Dual Voice Coil (DVC) with easy configuration jumpers that allow for flexible applications. A new “EZ-Change” twist-lock grille mounting system makes it easy to install and remove an optional grille without mounting screws for added protection to the cone. The new R-Series subwoofers contain Alpine’s High Amplitude Multi-Roll (HAMR) Surround Technology. The R-Series subwoofers are High-Resolution Audio Compliant. Rated at 350W RMS (1000 peak power handling), the R-Series subwoofers will provide deep bass output.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eDual Voice Coil (DVC) Subwoofers with Configuration Jumpers\u003c\/li\u003e\n\u003cli\u003eFrequency Response (0\/-3dB): 30Hz-200Hz\u003c\/li\u003e\n\u003cli\u003eSensitivity (1W\/1m): 83.5dB\u003c\/li\u003e\n\u003cli\u003eNominal Impedance: 2Ω (4+4) or 4Ω (2+2)\u003c\/li\u003e\n\u003cli\u003e35mm voice coil\u003c\/li\u003e\n\u003cli\u003eCTA-2031 compliant\u003c\/li\u003e\n\u003cli\u003eMounting Depth: 4-3\/8” (118mm)\u003c\/li\u003e\n\u003cli\u003eCutout Size: 6-15\/16” (176mm)\u003c\/li\u003e\n\u003cli\u003eXMax: 12mm\u003c\/li\u003e\n\u003cli\u003eMagnet Weight: 56oz\u003c\/li\u003e\n\u003cli\u003ePush-Type Speaker Terminals (Up to 8AWG Wire Size)\u003c\/li\u003e\n\u003cli\u003ePolypropylene\/Ceramic Composite Dust Cap\u003c\/li\u003e\n\u003cli\u003eKevlar Reinforced Pulp Cone High-Performance subwoofers\u003c\/li\u003e\n\u003cli\u003eTwist-Lock Grille Mount System\u003c\/li\u003e\n\u003cli\u003eHigh-Amplitude Multi-Roll (H.A.M.R.) Surround\u003c\/li\u003e\n\u003cli\u003eHi-Res Audio Compliant (High-Resolution Audio Playback)\u003c\/li\u003e\n\u003cli\u003eLarge Double-Stacked Magnets\u003c\/li\u003e\n\u003cli\u003e350W RMS\/1000W Peak Power Handling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong\u003eGeneral Specifications:\u003c\/strong\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003e• Size: 8”\u003c\/li\u003e\n\u003cli\u003e• Dimensions: 7.64” x 7.64” x 4.56”\u003c\/li\u003e\n\u003cli\u003e• Frequency Response: 30Hz - 200Hz\u003c\/li\u003e\n\u003cli\u003e• Power Range: 150W - 350W RMS\u003c\/li\u003e\n\u003cli\u003e• Power Handling: 350W RMS \/ 1000W Peak\u003c\/li\u003e\n\u003cli\u003e• Magnet Weight: 56 oz\u003c\/li\u003e\n\u003cli\u003e• Voice Coil Diameter: 40 mm (2.6”)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong\u003eBOX SPECS\u003c\/strong\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eSEALED BOX RANGE:\u003c\/li\u003e\n\u003cli\u003eNet Internal Volume: 0.15 - 0.45 cubic ft\u003c\/li\u003e\n\u003cli\u003eRECOMMENDED SEALED BOX:\u003c\/li\u003e\n\u003cli\u003eExternal Dimensions: 13” x 13” x 5.5”\u003c\/li\u003e\n\u003cli\u003eGross Internal Volume: 0.30 cubic ft\u003c\/li\u003e\n\u003cli\u003eNet Internal Volume: 0.25 cubic ft\u003c\/li\u003e\n\u003cli\u003eD2 - F3, Qtc: 59Hz, 0.73\u003c\/li\u003e\n\u003cli\u003eD4 - F3, Qtc: 59Hz, 0.72\u003c\/li\u003e\n\u003cli\u003eVENTED BOX RANGE:\u003c\/li\u003e\n\u003cli\u003eNet Internal Volume: 0.25 - 0.7 cubic ft\u003c\/li\u003e\n\u003cli\u003eFb, Tuning: 36-40Hz\u003c\/li\u003e\n\u003cli\u003eRECOMMENDED VENTED BOX:\u003c\/li\u003e\n\u003cli\u003eExternal Dimensions: 11” x 9.5” x 21”\u003c\/li\u003e\n\u003cli\u003eGross Internal Volume: 0.86 cubic ft\u003c\/li\u003e\n\u003cli\u003eVent Area (W x H): 8 square in (8” x 1”)\u003c\/li\u003e\n\u003cli\u003eVent Length: 17.5”\u003c\/li\u003e\n\u003cli\u003eVent Displacement: 0.13 cubic ft\u003c\/li\u003e\n\u003cli\u003eNet Internal Volume (Vb): 0.68 cubic ft\u003c\/li\u003e\n\u003cli\u003eD2 - F3, Ripple, Fb: 33Hz, 2.5 dB, 39Hz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong\u003eTHIELE-SMALL PARAMETERS\u003c\/strong\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003e• Sensitivity (1W\/1m): 83.6 dB\u003c\/li\u003e\n\u003cli\u003e• DC Resistance (Re): 1.8∆ + 1.8∆\u003c\/li\u003e\n\u003cli\u003e• Free Air Resonance (Fs): 42 Hz\u003c\/li\u003e\n\u003cli\u003e• Equivalent Stiffness: 10.1 L\u003c\/li\u003e\n\u003cli\u003e• Mechanical Q (Qms): 7.69\u003c\/li\u003e\n\u003cli\u003e• Electrical Q (Qes): 0.52\u003c\/li\u003e\n\u003cli\u003e• Total Q (Qts): 0.48\u003c\/li\u003e\n\u003cli\u003e• Cone Area (Sd): 201 square cm\u003c\/li\u003e\n\u003cli\u003e• Linear Excursion (Xmax): 12 mm\u003c\/li\u003e\n\u003cli\u003e• Mechanical Travel (Xmech): 52 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv data-content-region=\"product_below_title\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv data-content-region=\"product_below_title--global\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/article\u003e\n\u003carticle class=\"productView-description\" id=\"productDescription\"\u003e\u003c\/article\u003e\n\u003carticle class=\"productView-description\" id=\"productDescription\"\u003e\u003c\/article\u003e","brand":"Alpine","offers":[{"title":"Default Title","offer_id":45241079037986,"sku":"R2-W8D2","price":374.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/3472\/1600\/files\/1_a3679c4c-267c-464e-977d-982f945ea771.jpg?v=1776269986","url":"https:\/\/www.eastcaraudio.net\/products\/alpine-r2-w12d4-12-r-series-r2-subwoofer-dual-4-ohm-750-watt-rms-copy","provider":"East Car Audio","version":"1.0","type":"link"}