{"product_id":"ad-2108-d4","title":"AD2108 D4","description":"In Store Pick Up Only\u003cbr\u003e\u003cbr\u003e\u003ch3\u003eHighlights\u003c\/h3\u003e\n\u003cp style=\"background-color: rgba(0, 0, 0, 0) !important;\"\u003e100W - 500W optimal power range\u003cbr style=\"background-color: rgba(0, 0, 0, 0) !important;\"\u003eThermally-coupled aluminum cone \u0026amp; dustcap.\u003cbr style=\"background-color: rgba(0, 0, 0, 0) !important;\"\u003eDesigned for use in small vented enclosures.\u003cbr style=\"background-color: rgba(0, 0, 0, 0) !important;\"\u003eEngineered in the USA.\u003c\/p\u003e\n\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp style=\"background-color: rgba(0, 0, 0, 0) !important;\"\u003eThe 2100 series 8 employs a finely-tuned balance of damping and motor force to achieve high efficiency, offering exceptional versatility and performance in a variety of real-world functions:\u003c\/p\u003e\u003cp style=\"background-color: rgba(0, 0, 0, 0) !important;\"\u003ePaired with a traditional (4th order) bass-reflex enclosure, the subwoofer's output can be focused along a narrow bandwidth for use in sheer loudness \/ SPL applications. In a 6th order bass-reflex, the output can be spread along a wider frequency range, shifting emphasis onto sound quality with articulate delivery and highly controlled excursion.\u003c\/p\u003e\u003cpre\u003e\u003cstrong\u003eFs\u003c\/strong\u003e\t52.490 Hz\n\u003cstrong\u003eQms\u003c\/strong\u003e\t4.970\n\u003cstrong\u003eVas\u003c\/strong\u003e\t4.160 l\n\u003cstrong\u003eCms\u003c\/strong\u003e\t0.060 mm\/N\n\u003cstrong\u003eMms\u003c\/strong\u003e\t134.200 g\n\u003cstrong\u003eRms\u003c\/strong\u003e\t8.990 kg\/s\n\u003cstrong\u003eDia\u003c\/strong\u003e\t162.740 mm\n\u003cstrong\u003eSd\u003c\/strong\u003e\t208.000 cm²\n\n\u003cstrong\u003eQes\u003c\/strong\u003e\t0.720\n\u003cstrong\u003eRe\u003c\/strong\u003e\t7.240  ohm\n\u003cstrong\u003eLe\u003c\/strong\u003e\t2.440 mH\n\u003cstrong\u003eZ\u003c\/strong\u003e\t8.690  ohm\n\u003cstrong\u003eBl\u003c\/strong\u003e\t21.010 Tm\n\u003cstrong\u003eBl²\/Re\u003c\/strong\u003e\t60.920 N²\/W\n\n\u003cstrong\u003eQts\u003c\/strong\u003e\t0.630\n\u003cstrong\u003eno\u003c\/strong\u003e\t0.070 %\n\u003cstrong\u003eSPL\u003c\/strong\u003e\t81.170 dB\n\u003cstrong\u003eEBP\u003c\/strong\u003e\t72\n\n\u003cstrong\u003eNominal Diameter\u003c\/strong\u003e\t\t8in\n\u003cstrong\u003eOverall Diameter\u003c\/strong\u003e\t\t8.26in \/ 210mm\n\u003cstrong\u003eMounting Hole Diameter\u003c\/strong\u003e\t\t7.16in \/ 182mm\n\u003cstrong\u003eBolt Hole Circle Diameter\u003c\/strong\u003e\u003cstrong\u003eMotor Outer Diameter\u003c\/strong\u003e\u003cstrong\u003eMounting Depth\u003c\/strong\u003e\t\t\t4.68in \/ 119mm\n\u003cstrong\u003eRequired Pole Vent Clearance\u003c\/strong\u003e\u003cstrong\u003eDriver Displacement\u003c\/strong\u003e\t\t0.04 cu ft \/ 1.37l\n\n\u003cstrong\u003eMinimum Sealed Volume\u003c\/strong\u003e\t\tN\/A\n\u003cstrong\u003eMinimum Vented Volume\u003c\/strong\u003e\t\t0.49 cu ft \/ 14l net*\n\n* Tune for desired response\u003c\/pre\u003e\u003cp\u003e\u003cimg alt=\"\" class=\"alignnone size-full wp-image-524\" decoding=\"async\" height=\"978\" loading=\"lazy\" sizes=\"(max-width: 800px) 100vw, 800px\" src=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/recommended_enc_2108_vented.png\" srcset=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/recommended_enc_2108_vented.png 800w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/recommended_enc_2108_vented-245x300.png 245w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/recommended_enc_2108_vented-768x939.png 768w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/recommended_enc_2108_vented-600x734.png 600w\" width=\"800\"\u003e\u003c\/p\u003e\u003cp\u003eThe above designs have been engineered for a \"two tier\" balance of compatibility: First, between the cabin acoustics of a sedan, hatchback and an SUV, and second, between the two available voice coil configurations, for a total of six balance points. This ensures a linear response and optimal power handling for listening purposes under most circumstances. Please visit our \u003ca href=\"https:\/\/adcaraudio.com\/store\/enclosure-design-service\/\"\u003eEnclosure Design Service\u003c\/a\u003e page for custom designs.\u003c\/p\u003e","brand":"Audio Dynamics","offers":[{"title":"Default Title","offer_id":53954125168924,"sku":"AD-2108 D4","price":219.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/0142\/7228\/files\/products_subwoofers_2000_ad2108_01.png?v=1772428670","url":"https:\/\/kaosor.com\/products\/ad-2108-d4","provider":"Kaos Offroad","version":"1.0","type":"link"}