{"product_id":"alpine-r-series-8-subwoofer-box-ported-sbr-s8d4-2","title":"ALPINE R Series 8\" Subwoofer Box ( Ported ) - SBR-S8D4.2","description":"\u003cp align=\"justify\"\u003e\u003cstrong\u003eAward winning SBR-S8D4, named INCAR SUBWOOFER OF THE YEAR – LOADED ENCLOSURE for 2017.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp align=\"justify\"\u003eThe SBR-S8D4 features Alpine’s Type-R 8″ subwoofer in a custom slot ported enclosure. Ideal for installation in small spaces, its compact size means it can fit virtually anywhere.\u003c\/p\u003e\n\u003cp align=\"justify\"\u003eThe pre-installed subwoofer employs many features typically found in larger models, such as Alpine’s H.A.M.R (High Amplitude Multi Roll) suspension. This unique design allows greater linear excursion while improving control, to achieve maximum output and outstanding sound quality.\u003c\/p\u003e\n\u003cp align=\"justify\"\u003eDesigned to achieve optimal output, the carpeted enclosure features heavy duty MDF construction. Plus, stylish brushed aluminium laminate and a robust grill create the perfect balance of stunning aesthetics and practicality.\u003c\/p\u003e\n\u003cp align=\"justify\"\u003e \u003c\/p\u003e\n\u003cdiv class=\"full-shop columns masonry-shop-item specs-six\"\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003e900W Peak Power\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003e300W RMS Power (4ohm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eHigh Amplitude Multi Roll (HAMR) surround\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eFrequency Response: 28Hz – 400Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eUSA Designed Slot Ported Subwoofer Enclosure\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eHeavy Gauge Spring Terminals\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eDimensions: (L x W x H cm) 49 x 29 x 16\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eR2-W8D4 Pre-installed\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eGrille Included and Pre-Installed\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"full-shop columns masonry-shop-item specs-six\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eSubwoofer Size: 8″\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003ePower Handling (RMS\/Peak): 350W\/1000W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003ePower Range (RMS): 150W-350W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eFrequency Response (Hz): 28Hz-200Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eDiaphragm Material: Kevlar-Reinforced Pulp Fiber\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eDiaphragm Design: 2-piece structural parabolic\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eSurround Material: Injection molded santoprene\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eSurround Design: High Amplitude Multi-Roll (Patent Pending)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eSpider Material: Nomex\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eSpider Design: Progressive\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eVoice Coil Material: 180˚C High Temp Wire on Spiral Cut Aluminium Former\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eVoice Coil Design: 4-Layer Dual Voice Coil\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eMotor Structure Pole Geometry: Compound Radius Curve\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eMotor Structure Configuration: Integration Shorting Sleeve with Radial Vented VC Head Transfer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eMagnet Material: High-Power Strontium Ferrite\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eMagnet Configuration: 6-Piece (8″) \/ 10-Piece (10″\/12″) Radially Segmented, Double Stacked\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eFrame Material: Cast Aluminium\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eFrame Design: Single-Piece Casting with Airflow Management System\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eTerminals Layout: One sided\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eTerminals Design: Heavy Duty 8ga, Push with housing, Banana Sockets for VC Configuration Jumpers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eTinsel Leads Design: Reinforced Layer Spider Integration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eGasket Design: Concealed Mount Gasket System and Integrated Grill Ready\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cstrong\u003e\u003cspan class=\"s2\"\u003eELECTRO-MECHANICAL PARAMETERS\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eNominal Impedance: 2ohms+2ohms (4ohms at terminal)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eFrequency Response: 28-200Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eSensitivity (SPL @ 1W\/1m): 83.5dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eD.C Coil Resistance (Re): 1.85ohms +1.85ohms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eInductance (Le) 1kHz\/20kHz: 0.87mH\/0.30mH\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eFree Air Resonance (Fs): 38Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eEquivalent Stiffness (Vas): 12L (0.42 ft³)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eMechanical Q (Qms): 7.8\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eElectrical Q (Qes): 0.55\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eTotal Q (Qts): 0.50\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eXmax10 (One-Way Xmax @ 10% Distortion): 14mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eMechanical Excursion, Peak-to-Peak: 52mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eGap Height (Hag): 10mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eCoil Height (Hvc): 29mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eCone Area (Sd): 201 cm²\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eVoice Coil Diameter: 40mm (1.6″)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\u003cspan class=\"s2\"\u003eMagnet Weight: 52oz\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Alpine","offers":[{"title":"Default Title","offer_id":46973810311356,"sku":"SBR-S8D4.2","price":359.96,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/5704\/8252\/files\/s-l960_4_17388e49-90ff-485d-8339-fe28b7108547.webp?v=1781688577","url":"https:\/\/audioemporium.com.au\/products\/alpine-r-series-8-subwoofer-box-ported-sbr-s8d4-2","provider":"Audio Emporium","version":"1.0","type":"link"}