{"product_id":"american-bass-hd-series-18-subwoofer","title":"American Bass HD Series 18\" Subwoofer","description":"\u003cdiv\u003e\n\u003cp\u003eThe American Bass HD Series 18\" Subwoofer is a heavy‑duty, high‑output driver designed for car‑audio enthusiasts who demand serious bass and flexible amplifier matching.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eRMS Power\u003c\/b\u003e: 2000W — represents continuous power handling, enabling sustained bass output when paired with an appropriate amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMax Power\u003c\/b\u003e: 4000W — indicates peak power capability for brief dynamic bass peaks without distortion when demanded by the music.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eImpedance (Ohms)\u003c\/b\u003e: D1 \/ D2 — dual‑voice‑coil design allowing multiple wiring configurations to match different amplifiers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSensitivity\u003c\/b\u003e: 89 dB — reflects efficiency; higher sensitivity means more output for a given input power, aiding system design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMounting Depth\u003c\/b\u003e: 16.85 in — installation depth requirement to clear in how deep the woofer sits in the mounting location.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCutout Size\u003c\/b\u003e: 11.4 in — diameter of the opening required in the enclosure or mounting surface for proper fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePorted Box (ft3)\u003c\/b\u003e: 5.5 - 6.5 — recommended enclosure volume for a ported configuration, influencing low‑frequency extension and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMagnet Size\u003c\/b\u003e: 350 oz — magnet mass contributing to control of cone motion and handling of high excursion demands.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVoice Coil Size\u003c\/b\u003e: 3 — diameter of the voice coil, affecting heat handling and excursion capability under heavy drive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBasket Type\u003c\/b\u003e: Cast — rigid frame construction supporting durability and stable operation at high excursion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRecommended Amp (Pair)\u003c\/b\u003e: VFL 4K — pairing guidance to achieve sufficient headroom and clean power delivery in a high‑output setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn a performance‑driven build, this sub benefits from a ported enclosure in the 5.5–6.5 ft3 range, robust 350 oz magnetism, and a dual impedance design that lets you tailor amplifier loading. The cast basket and 16.85 in mounting depth demand careful enclosure and vehicle fit, but deliver reliable, high‑power bass when paired with the recommended VFL 4K amplifier.\u003c\/p\u003e \u003cbr\u003e \u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eRMS POWER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e2000W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eMAX POWER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e4000W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eIMPEDANCE (OHMS)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003eD1 \/ D2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003e\u003cspan\u003eSENSITIVITY DB\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cspan data-sheets-value='{\"1\":3,\"3\":89}' data-sheets-userformat='{\"2\":12925,\"3\":{\"1\":0},\"5\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"6\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"7\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"8\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"9\":1,\"12\":0,\"15\":\"Calibri\",\"16\":8}'\u003e89\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eMOUNTING DEPTH (IN)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cspan data-sheets-value='{\"1\":3,\"3\":16.85}' data-sheets-userformat='{\"2\":12925,\"3\":{\"1\":0},\"5\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"6\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"7\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"8\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"9\":1,\"12\":0,\"15\":\"Calibri\",\"16\":8}'\u003e16.85\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eCUTOUT SIZE (IN)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cspan data-sheets-value='{\"1\":3,\"3\":11.4}' data-sheets-userformat='{\"2\":12925,\"3\":{\"1\":0},\"5\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"6\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"7\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"8\":{\"1\":[{\"1\":2,\"2\":0,\"5\":{\"1\":2,\"2\":0}},{\"1\":0,\"2\":0,\"3\":3},{\"1\":1,\"2\":0,\"4\":1}]},\"9\":1,\"12\":0,\"15\":\"Calibri\",\"16\":8}'\u003e11.4\u003c\/span\u003e\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003ePORTED BOX (FT3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cspan data-sheets-value='{\"1\":2,\"2\":\"5.5 - 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