{"product_id":"sundown-audio-zv718d2-18-inch-subwoofer","title":"Sundown Audio ZV718D2 Z-Series v.7 18\" Subwoofer - Dual 2-Ohm, 3.3\" Voice Coil, 42mm Linear Excursion","description":"\u003cp\u003eThe Sundown Audio ZV718D2 is the 18-inch, dual 2-ohm model of the Z v.7, which sits above the M and X v.4 in Sundown's 2025 ultra-high excursion subwoofer lineup. Its custom tooled, patented mega-platform frame carries a quad stacked 265mm (10.43-inch) motor with a 100mm magnet stack and a hyper-extended pole, with clearance for more than 4 inches of peak-to-peak travel before mechanical bottom. Sundown rates the motor force factor (BL^2\/RE) at roughly 50% above the Z v.6.\u003c\/p\u003e\n\u003cp\u003eA 3.3-inch, 4-layer round wire aluminum voice coil is wound on a thick aluminum former using Sundown's fat wire method for high power and abuse. The coil is cooled by a patent-pending airflow directing pole cap, six pole OD channels, sixteen gap vents and a cross-drilled, slotted top plate, while a 9mm magnet ID Faraday ring and pole-extension inductance sleeve give linear inductance.\u003c\/p\u003e\n\u003cp\u003eThe 95mm winding length allows 42mm of one-way linear excursion by 70% BL. The Z v.7 targets the lowest possible bass extension from a small ported box with very low distortion, and it works in enclosures commonly used for Sundown mega-platform subwoofers.\u003c\/p\u003e\n\u003ch6\u003e\u003cstrong\u003eHIGHLIGHTS:\u003c\/strong\u003e\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eDual 2-ohm voice coils\u003c\/li\u003e\n\u003cli\u003e42mm one-way linear excursion (70% BL)\u003c\/li\u003e\n\u003cli\u003eQuad stacked 265mm motor, 100mm magnet stack height\u003c\/li\u003e\n\u003cli\u003e3.3-inch 4-layer round wire aluminum voice coil\u003c\/li\u003e\n\u003cli\u003e9mm Faraday ring and pole-extension inductance sleeve\u003c\/li\u003e\n\u003cli\u003ePatented mega-platform frame\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003e\u003cstrong\u003eGREAT FOR:\u003c\/strong\u003e\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003ePorted 18-inch builds\u003c\/li\u003e\n\u003cli\u003eVery low bass extension with low distortion\u003c\/li\u003e\n\u003cli\u003eBuilds using existing Sundown mega-platform boxes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003e\u003cstrong\u003eSPECIFICATIONS:\u003c\/strong\u003e\u003c\/h6\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSERIES\u003c\/td\u003e\n\u003ctd\u003eZ-Series v.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSIZE\u003c\/td\u003e\n\u003ctd\u003e18 Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIMPEDANCE\u003c\/td\u003e\n\u003ctd\u003eDual 2 Ohm (DVC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVOICE COIL\u003c\/td\u003e\n\u003ctd\u003e3.3 Inch, 4-layer round wire aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVOICE COIL WINDING LENGTH\u003c\/td\u003e\n\u003ctd\u003e95mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMOTOR\u003c\/td\u003e\n\u003ctd\u003eQuad stacked, 265mm (10.43 in) diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMAGNET STACK HEIGHT\u003c\/td\u003e\n\u003ctd\u003e100mm (3.94 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLINEAR EXCURSION\u003c\/td\u003e\n\u003ctd\u003e42mm one-way (70% BL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFARADAY RING\u003c\/td\u003e\n\u003ctd\u003e9mm magnet ID\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFRAME\u003c\/td\u003e\n\u003ctd\u003ePatented mega-platform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSOLD AS\u003c\/td\u003e\n\u003ctd\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBRAND\u003c\/td\u003e\n\u003ctd\u003eSundown Audio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e810199220062\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":52212310245671,"sku":"SUN-ZV718D2","price":1469.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/8075\/6007\/files\/ZV7CoverImage.png?v=1790942427","url":"https:\/\/eliteautogear.com\/products\/sundown-audio-zv718d2-18-inch-subwoofer","provider":"Elite Auto Gear","version":"1.0","type":"link"}