{"product_id":"used-d-b-j-infra-subwoofer","title":"Used d\u0026b J-Infra Subwoofer","description":"\u003cp\u003e8 Available, sold in group of 8 only\u003c\/p\u003e\n\u003cdiv class=\"page\" title=\"Page 1\"\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch2\u003ed\u0026amp;b audiotechnik J-Infra Subwoofer with NL8 Speakon Connection\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe J-INFRA is a cardioid infra subwoofer that can be used to supplement J-Series systems consisting of J8, J12 and J-SUB cabinets. It extends the frequency response of a J-Series system down to 27 Hz and can only be used in ground stacked configurations in conventional left\/right set-ups, as well as arranged in an infra subwoofer array. It has two bass-reflex chambers containing three 21\" drivers, two facing forward in one chamber that are driven from one channel of the d\u0026amp;b amplifier and one facing backwards driven by another amplifier channel. Through this driver set-up its cardioid dispersion pattern avoids unwanted energy behind the system and greatly reduces the reverberant field at low frequencies, providing highest accuracy in low frequency reproduction. Selecting Hypercardioid mode in the amplifier optimises the tuning of front and rear channels for a maximum rejection at the left and right sides behind the cabinet. The J-INFRA cabinet is constructed from marine plywood and has an impact and weather protected PCP (Polyurea Cabinet Protection) finish. The front and rear of the loudspeaker cabinet are protected by a rigid metal grill and the side panels incorporate eight handles. The cabinet front is fitted with four catches for securing an optional wooden lid.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLarge format cardioid subwoofer\u003c\/p\u003e\n\u003cul class=\"b_list b_list--bullet\"\u003e\n\u003cli class=\"b_list__item\"\u003eComponents 3 x 21\"\u003c\/li\u003e\n\u003cli class=\"b_list__item\"\u003eDispersion Cardioid\u003c\/li\u003e\n\u003cli class=\"b_list__item\"\u003eSPLmax 144 dB\u003c\/li\u003e\n\u003cli class=\"b_list__item\"\u003eWeight 152 kg \/ 335 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"d\u0026b","offers":[{"title":"Default Title","offer_id":46980656660641,"sku":null,"price":7500.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/8088\/3105\/files\/Untitled_32bbade8-768e-4f37-ad2b-9486dda1978c.jpg?v=1788804217","url":"https:\/\/shop.soundart.com\/products\/used-d-b-j-infra-subwoofer","provider":"Sound Art Used Gear","version":"1.0","type":"link"}