{"title":"21-Inch Subwoofers","description":null,"products":[{"product_id":"audio-ace-blackjack-21","title":"Audio Ace Blackjack 21\" 5500W RMS Car Subwoofer","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower\u003c\/strong\u003e — 5500W RMS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoice Coil\u003c\/strong\u003e — 5\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e — 21\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e — 120 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFs\u003c\/strong\u003e — 38 Hz\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eThis Listing Includes:\u003c\/strong\u003e (1) Audio Ace Blackjack 21\" Subwoofer\u003c\/p\u003e\u003cp\u003eThe Audio Ace Blackjack is a 21-inch subwoofer for builders who don't compromise on power, rated at 5500W RMS on a massive 5\" voice coil and weighing 120 lbs. Due to its size and output it is not suited to limited spaces — handle and install with care. Authorized Audio Ace dealer at JS Ultimate Sounds. Free shipping on orders $99+.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e5500W RMS power handling\u003c\/li\u003e\n\u003cli\u003e5\" voice coil\u003c\/li\u003e\n\u003cli\u003e21\" SPL-focused cone\u003c\/li\u003e\n\u003cli\u003eHeavy 120 lb build\u003c\/li\u003e\n\u003cli\u003e90 dB sensitivity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eSize\u003c\/td\u003e\n\u003ctd\u003e21\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eRMS Power\u003c\/td\u003e\n\u003ctd\u003e5500W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eVoice Coil\u003c\/td\u003e\n\u003ctd\u003e5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e120 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eFs\u003c\/td\u003e\n\u003ctd\u003e38 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eQts\u003c\/td\u003e\n\u003ctd\u003e0.283\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eQes\u003c\/td\u003e\n\u003ctd\u003e0.311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eQms\u003c\/td\u003e\n\u003ctd\u003e3.178\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eSPL\u003c\/td\u003e\n\u003ctd\u003e90 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eRe\u003c\/td\u003e\n\u003ctd\u003e0.9 + 0.9 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:35%;\"\u003eBL\u003c\/td\u003e\n\u003ctd\u003e34.556\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Audio Ace","offers":[{"title":"Default Title","offer_id":66741397192749,"sku":"AA-BLACKJACK-21","price":1499.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/8096\/4909\/files\/audio-ace-blackjack-21-w_99553b3b-c5b9-4123-b3a8-bb7750973cc3.jpg?v=1782674947"},{"product_id":"ds18-pro-bx21n-1-21-neodymium-woofer-6000-watts-6-1-ohm-svc","title":"DS18 PRO-BX21N.1 21\" Neodymium Woofer 6000 Watts 6\" 1-Ohm SVC","description":"\u003cmeta charset=\"utf-8\"\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cstrong\u003eDS18 \u003cspan style=\"color: #ff0000;\"\u003ePRO-BX21N.1\u003c\/span\u003e 21\" Neodymium Woofer 6000 Watts 6\"1-Ohm SVC\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eIntroducing the BX Series, taking the PRO Audio scene to another dimension. Built tough for Extreme Audiophiles with a 6\" Voice Coil, Neodymium Magnet and reinforced Paper Cone for Outstanding Performance. We offer you 4 different models to choose from for your own configuration. Capable of handling serious power to fulfill all your musical needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHighlights\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMassive pro audio subwoofer very popular in turbo ported boxes that push out the pounding bass just as loud as the screaming pro audio mids.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHuge amount of cone area in the 18 or 21 inch models powered by a massive Neodymium magnet for pounding bass at very high DB levels.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMassive 6 inch voice coil made to handle the extreme power and temperatures you will put on it daily for long life and durability.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch5\u003eTechnical Features\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cdiv class=\"widthfiftyfive\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0018\/0142\/0861\/files\/PRO-BX21N.1_-_PARAMETERS_1.jpg?v=1624541543\" target=\"_blank\"\u003e\u003cstrong\u003eDownload PRO-BX21N.1 Product Manual \u003cstrong\u003e\u003cimg loading=\"lazy\" width=\"20px;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0018\/0142\/0861\/files\/pdf-icon.jpg?v=1623253955\"\u003e\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"widthfiftyfive\"\u003e\n\u003ctable width=\"214\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"214\"\u003e3000 Watts RMS Power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6000 Watts MAX Power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFree Air Response (Fs):35.6 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity:98dB\/W\/M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response:32Hz - 1KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoice Coil: 6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eX-MAX: 22mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Depth: 9.8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnet: Neodymium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight:41.8 LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eAuthorized DS18 dealer at JS Ultimate Sounds. Free shipping on orders $99+.\u003c\/strong\u003e\u003c\/p\u003e","brand":"DS18","offers":[{"title":"Default Title","offer_id":66876311633965,"sku":"PRO-BX21N.1","price":1559.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/8096\/4909\/files\/PRO-BX21N.1-SINGLE-2000x2000.jpg?v=1781701797"},{"product_id":"ds18-pro-bx21n-2-21-neodymium-woofer-6000-watts-6-2-ohm-svc","title":"DS18 PRO-BX21N.2 21\" Neodymium Woofer 6000 Watts 6\" 2-Ohm SVC","description":"\u003cmeta charset=\"utf-8\"\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cstrong\u003eDS18 \u003cspan style=\"color: #ff0000;\"\u003ePRO-BX21N.2\u003c\/span\u003e 21\" Neodymium Woofer 6000 Watts 6\" 2-Ohm SVC\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIntroducing the BX Series, taking the PRO Audio scene to another dimension. Built tough for Extreme Audiophiles with a 6\" Voice Coil, Neodymium Magnet and reinforced Paper Cone for Outstanding Performance. We offer you 4 different models to choose from for your own configuration. Capable of handling serious power to fulfill all your musical needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHighlights \u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMassive pro audio subwoofer very popular in turbo ported boxes that push out the pounding bass just as loud as the screaming pro audio mids.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHuge amount of cone area in the 18 or 21 inch models powered by a massive Neodymium magnet for pounding bass at very high DB levels.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMassive 6 inch voice coil made to handle the extreme power and temperatures you will put on it daily for long life and durability.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cspan mce-data-marked=\"1\"\u003eTechnical Details\u003c\/span\u003e\u003c\/h5\u003e\n\u003ctable width=\"214\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"214\"\u003e3000 Watts RMS Power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6000 Watts MAX Power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFree Air Response (Fs):35.6 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity:98dB\/W\/M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response:32Hz - 1KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoice Coil: 6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eX-MAX: 22mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Depth: 9.8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnet: Neodymium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight:41.8 LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch5\u003eManual\u003c\/h5\u003e\n\u003ca href=\"https:\/\/www.dropbox.com\/s\/9j50guv4onlz87r\/PRO-BX21N.1%20-%20PARAMETERS%20%281%29.jpg?dl=0\" target=\"_blank\"\u003e\u003cimg loading=\"lazy\" width=\"200px;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0018\/0142\/0861\/files\/DOWNLOAD-MANUAL.jpeg?v=159135983\"\u003e\u003c\/a\u003e\n\u003cp\u003e\u003cstrong\u003eAuthorized DS18 dealer at JS Ultimate Sounds. Free shipping on orders $99+.\u003c\/strong\u003e\u003c\/p\u003e","brand":"DS18","offers":[{"title":"Default Title","offer_id":66876311699501,"sku":"PRO-BX21N.2","price":1559.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/8096\/4909\/files\/PRO-BX21N.2-SINGLE-2000x2000.jpg?v=1781701797"}],"url":"https:\/\/www.jsultimatesounds.com\/collections\/21-subwoofers.oembed","provider":"JS Ultimate Sounds","version":"1.0","type":"link"}