Summary:JL Audio's proprietary Dynamic Motor Analysis system is a powerful suite of FEA-based modeling systems, first developed by JL Audio in 1997 and refined over the years to scientifically address the issue of speaker motor linearity. or by 'acts of God' (flooding, lightning, locusts, etc.)\u003cbr\u003e8. (The warranty is not transferable and will not apply to products purchased from unauthorized dealers.)\u003cbr\u003e3. Note: Products purchased from unauthorized dealers are not covered under warranty.Warranty LimitationsThe following is not covered under JL Audio's warranty program:1. Engineered as the reference standard for marine subwoofer performance, the M7-12IB is capable of producing staggering amounts of jaw-dropping bass in infinite-baffle applications. M7 12-inch Marine Subwoofer Driver for Infinite-Baffle Use (600 W, 4 Ω) - Gunmetal Trim Ring, Titanium Sport Grille. This research is aimed at decoding what we refer to as the \"Loudspeaker Genome\"... a project aimed at understanding the true behavior of loudspeakers under power and in motion. Product owned by anyone other than the original purchaser from an authorized JL Audio dealer. This delivers intensely valuable information compared to traditional modeling, which assumes that the \"fixed\" field produced in the air gap by the magnet and the motor plates is unchanging. DMA's breakthrough is that it actually considers the effects of power through the coil as well as coil\/cone position within the framework of a time-domain analysis. Starting with the 15W3 and the W7 Subwoofers in the late 1990's and early 2000's, DMA has played an important role in the design of all JL Audio woofers sold today, including our component woofers. Product that has been physically abused (run over by a car or beat with a hammer, for example).\u003cbr\u003e4. Subwoofers: W7, W6v3, TW5v2, TW3, TW1, W3v3, Enclosed Car Subwoofers: Stealthbox®, PowerWedge™, ProWedge™, H.O. This testing is critical to building products that will not only sound great in your boat, but will also sound great for many, many years.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Q-Fog Environmental Test Chamber\" src=\"https:\/\/embed.widencdn.net\/img\/jlaudio\/lpm7ppvdsq\/exact\/_66A2554.jpeg?keep=c\u0026amp;crop=yes\u0026amp;u=rfhkrg\" width=\"400\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Q-UV Environmental Chamber\" src=\"https:\/\/embed.widencdn.net\/img\/jlaudio\/x09p28tyci\/exact\/_66A2522.jpeg?keep=c\u0026amp;crop=yes\u0026amp;u=rfhkrg\" width=\"400\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials Used:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003einjection-molded mica-filled polypropylene cone bodies with synthetic rubber surrounds, specifically formulated with UV inhibitors for marine duty.\u003c\/li\u003e\n\u003cli\u003eMarine-grade, synthetic fiber spiders with progressive roll designs to withstand high humidity.\u003c\/li\u003e\n\u003cli\u003eSpecifically engineered polymer baskets are corrosion and UV-resistant and encapsulate the woofer's motor system to prevent corrosion.\u003c\/li\u003e\n\u003cli\u003eGold-plated, marine-grade brass connection terminals\u003c\/li\u003e\n\u003cli\u003eMarine-grade stainless steel mounting hardware is included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/fn0gmjcegm\/JLA-BuiltinUSA-Logo-C.svg?u=fhkrg%20alt=\" built=\"\" in=\"\" u=\"\" s=\"\" a=\"\" with=\"\" global=\"\" components=\"\" width=\"200\"\u003e\n\u003ch3\u003eBuilt in U.S.A. with Global Components\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:\u003c\/strong\u003e\u003cbr\u003eJL Audio's Miramar, Florida loudspeaker production facility is one of the most advanced in the world.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed Information:\u003c\/strong\u003e\u003cbr\u003eAt a time when most audio products are built overseas, JL Audio’s commitment to in-house loudspeaker production continues to grow.