{"product_id":"u-series-6-5-v-1-subwoofer","title":"U-Series 6.5\" v.1 Subwoofer","description":"\u003cul\u003e\n\u003cli\u003eRMS 400 watts\u003c\/li\u003e\n\u003cli\u003eDual 2 or 4 ohm voice coils\u003c\/li\u003e\n\u003cli\u003eOptimized for small ported enclosures\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAluminum 1.75” voice coil former for superior heat dissipation\u003c\/li\u003e\n\u003cli\u003eHigh-temperature copper voice coil\u003c\/li\u003e\n\u003cli\u003eDouble stitched surround\u003c\/li\u003e\n\u003cli\u003eHeavy-duty cast basket\u003c\/li\u003e\n\u003cli\u003eSpring-loaded terminals accept up to 8-gauge wire\u003c\/li\u003e\n\u003cli\u003eStitched-on heavy-duty tinsel leads\u003c\/li\u003e\n\u003cli\u003eSolid pole with vent channels and aluminum shorting ring cap\u003c\/li\u003e\n\u003cli\u003eRear gap-venting\u003c\/li\u003e\n\u003cli\u003eTop-Plate Cooling Channels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePerfect for high-power underseat enclosures and designed to be at home in the competition lanes or playing your favorite tunes, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9” wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are also used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. An all-new, substantially thicker custom aluminum frame was designed specifically for the U Series, and equipped with heat-dissipation ribs. The v.2 motor also features an extended pole piece to keep the coil controlled under high stress!\u003c\/p\u003e\n\u003cdiv class=\"cus-flex\"\u003e\n\u003cdiv class=\"box-2\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"uk-margin\"\u003e\n\u003ctable class=\"uk-table uk-table-striped uk-table-small\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRE (Ohms)\u003c\/td\u003e\n\u003ctd\u003e4.0586\u003c\/td\u003e\n\u003ctd\u003e6.6274\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFS (Hz)\u003c\/td\u003e\n\u003ctd\u003e41.9533\u003c\/td\u003e\n\u003ctd\u003e38.6925\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVAS (L)\u003c\/td\u003e\n\u003ctd\u003e2.9053\u003c\/td\u003e\n\u003ctd\u003e3.7701\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQes\u003c\/td\u003e\n\u003ctd\u003e0.5238\u003c\/td\u003e\n\u003ctd\u003e0.5005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQms\u003c\/td\u003e\n\u003ctd\u003e8.5834\u003c\/td\u003e\n\u003ctd\u003e7.2470\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQts\u003c\/td\u003e\n\u003ctd\u003e0.4937\u003c\/td\u003e\n\u003ctd\u003e0.4681\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLe (mH)\u003c\/td\u003e\n\u003ctd\u003e4.0112\u003c\/td\u003e\n\u003ctd\u003e5.5892\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBL (NA)\u003c\/td\u003e\n\u003ctd\u003e16.7428\u003c\/td\u003e\n\u003ctd\u003e20.0082\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMms (Grams)\u003c\/td\u003e\n\u003ctd\u003e137.2546\u003c\/td\u003e\n\u003ctd\u003e124.3518\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCms (uM\/N)\u003c\/td\u003e\n\u003ctd\u003e104.8528\u003c\/td\u003e\n\u003ctd\u003e136.0613\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSens (dB @ 1w\/1m)\u003c\/td\u003e\n\u003ctd\u003e77.8706\u003c\/td\u003e\n\u003ctd\u003e78.1460\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eXmax\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"uk-text-nowrap\"\u003eT\/S SPECS\u003c\/th\u003e\n\u003cth class=\"uk-text-nowrap\"\u003e\u003cstrong\u003eU-6.5SW\" D2\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth class=\"uk-text-nowrap\"\u003e\u003cstrong\u003eU-6.5SW\" D4\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\n   \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"box-3\"\u003e\n\u003ch3\u003eEnclosure Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003ePorted Enclosure\u003c\/span\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eSize: .25-.35 cu. ft. net\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePort Area: 4-5 sq. in.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePort Tuning: 35hz -40hz\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSealed Enclosure\u003c\/span\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eSize: 0.125-0.2 cu. ft. net\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDisplacement:  .04 cu. ft. \u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDepth:  5.71\"\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eOutside Diameter: 7.17\"\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCutout: 5.94\"\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/U-6.5SW.PDF?v=1694533031\"\u003e\u003cstrong\u003ePhysical Dimensions\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Linear Audio UK","offers":[{"title":"D2","offer_id":57657762087286,"sku":null,"price":199.99,"currency_code":"GBP","in_stock":true},{"title":"D4","offer_id":57657762120054,"sku":null,"price":199.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0291\/9664\/8482\/files\/u-series-v2-65-u-65sw-1750w-subwoofer-748274.webp?v=1775952740","url":"https:\/\/www.d2ualternators.com\/products\/u-series-6-5-v-1-subwoofer","provider":"D2U Alternators","version":"1.0","type":"link"}