{"product_id":"dolby-sb218-dual-18-inch-cinema-subwoofer","title":"Dolby SB218 – Dual 18-Inch Cinema Subwoofer","description":"\u003ch2\u003eWhat is the Dolby SB218?\u003c\/h2\u003e\n\u003cp\u003eThe Dolby SB218 is a dual 18-inch, front-loaded cinema subwoofer built for the low-frequency effects (LFE) channel in Dolby Atmos, Dolby Surround 7.1 and 5.1 auditoriums. It delivers extended sub-bass and high output to every seat, with two pro-audio 18-inch drivers on 4-inch voice coils. It shares the cabinet engineering of the premium large-format Dolby SB218XL in a model sized for mainstream commercial screens. Creation Networks supplies, installs and commissions the SB218 as part of complete Dolby cinema sound systems.\u003c\/p\u003e\n\n\u003ch2\u003eHow does the Dolby SB218 work?\u003c\/h2\u003e\n\u003cp\u003eThe SB218 is a passive subwoofer that runs from an external amplifier channel with the high-pass and low-pass filtering Dolby specifies in its processing settings. Each 18-inch driver sits in its own acoustic chamber inside the cabinet, which improves performance and reliability compared with a shared enclosure. At 4 ohms the cabinet handles 1200 W at 61 Vrms and reaches 133 dB continuous and 141 dB measured peak SPL at one metre, with a frequency range of 26 Hz to 170 Hz and usable response down to 22 Hz.\u003c\/p\u003e\n\u003cp\u003eIn a typical Dolby Atmos room the LFE feed comes from a \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-atmos-cinema-processor-cp950a\"\u003eDolby CP950A Atmos cinema processor\u003c\/a\u003e or a \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-cp950-audio-processor\"\u003eDolby CP950\u003c\/a\u003e, and a Dolby Multichannel Amplifier such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-professional-multichannel-amplifier\"\u003eDMA16302\u003c\/a\u003e drives the cabinets. Dolby rates the SB218 at a 750 W measured power draw, which is the figure to use when sizing amplifier channels.\u003c\/p\u003e\n\u003cp\u003eCabinets can be stacked two high. Rubber feet and indexing recesses locate the upper unit, and threaded inserts accept the BKT.136 tie plates and BKT.FLR floor brackets (both sold separately) to couple the units together and anchor the stack to the auditorium floor. The advanced input plate uses a high-current, spring-loaded terminal block, so no crimp tools or spade lugs are needed.\u003c\/p\u003e\n\n\u003ch2\u003eWhat are the key features of the Dolby SB218?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 18-inch pro-audio drivers\u003c\/strong\u003e — two 18-inch woofers with 4-inch voice coils and FEM-optimized ferrite motors and suspensions deliver deep, high-output LFE.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndependent driver chambers\u003c\/strong\u003e — each driver has its own chamber within the cabinet for better performance and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool-free input plate\u003c\/strong\u003e — the high-current, spring-loaded terminal block speeds installation with no crimp tools or spade lugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStackable cabinet\u003c\/strong\u003e — rubber feet and indexing recesses allow a stack of up to two units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure mechanical coupling\u003c\/strong\u003e — threaded inserts accept the BKT.136 tie plates and BKT.FLR floor brackets, sold separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalance-centered handles\u003c\/strong\u003e — handles placed at the balance point make unpacking and positioning the 171 lb cabinet easier.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhere is the Dolby SB218 typically used?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCommercial cinema auditorium\u003c\/li\u003e\n\u003cli\u003eScreening room\u003c\/li\u003e\n\u003cli\u003eAuditorium\u003c\/li\u003e\n\u003cli\u003eHouse of worship\u003c\/li\u003e\n\u003cli\u003eMulti-purpose room\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable style=\"width:100%;max-width:640px;min-width:300px;table-layout:fixed;border-collapse:collapse;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width:38%\"\u003e\n\u003ccol style=\"width:62%\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eSB218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eFrequency range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e26 Hz - 170 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eUsable LF response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e22 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eCoverage window\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eOmni\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eRated impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e4 Ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSensitivity @ 1 W\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e102 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePower handling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e1200 W @ 61 Vrms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePower draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e750 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaximum voltage peak\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e175 Vpk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eMax continuous SPL @ 1 m\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e133 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eMeasured peak SPL @ 1 m\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e141 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTransducers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eLF - 18\" woofer (x 2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eWood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eAccessories\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eBKT.136 tie plates and BKT.FLR floor brackets (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions (unit)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e30\" H x 50.5\" W x 25.2\" D (76.2 x 128.4 x 64 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eWeight (unit)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e171 lb (77.6 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eWeight (shipping)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e187.96 lb (85.26 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs the Dolby SB218 compatible with Dolby Atmos and the CP950A?\u003c\/h3\u003e\n\u003cp\u003eYes. Dolby developed the SB218 for the LFE channel in Dolby Atmos, Dolby Surround 7.1 and 5.1 auditoriums, and it is fed from the LFE output of a Dolby cinema processor such as the CP950A or CP950 through an external amplifier channel.\u003c\/p\u003e\n\u003ch3\u003eWhich amplifier should drive the SB218?\u003c\/h3\u003e\n\u003cp\u003eThe SB218 is passive and presents a 4-ohm load rated at 1200 W @ 61 Vrms with a 750 W measured power draw. Dolby Multichannel Amplifiers such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-professional-32-channels-dma32301-multichannel-amplifier\"\u003eDMA32301\u003c\/a\u003e are a common pairing; Creation Networks sizes channels to the cabinet count during design.\u003c\/p\u003e\n\u003ch3\u003eCan SB218 cabinets be stacked?\u003c\/h3\u003e\n\u003cp\u003eYes, up to two units per stack. Use the BKT.136 tie plates to couple the cabinets and the BKT.FLR floor brackets to anchor the stack, both sold separately, and follow the Dolby owner's manual.\u003c\/p\u003e\n\u003ch3\u003eHow is the SB218 different from the SB218XL?\u003c\/h3\u003e\n\u003cp\u003eBoth use dual 18-inch drivers in the same cabinet footprint. The SB218XL is the premium large-format version with 1600 W handling and 19 Hz usable response, while the SB218 is rated at 1200 W with 22 Hz usable response.\u003c\/p\u003e\n\u003ch3\u003eWhat warranty and support come with the SB218?\u003c\/h3\u003e\n\u003cp\u003eThe SB218 is covered by Dolby's manufacturer warranty, and Creation Networks confirms the current terms with your quote. Our engineers design, install, tune and support Dolby cinema systems; browse the \u003ca href=\"https:\/\/creationnetworks.net\/collections\/dolby-professional\"\u003eDolby Professional collection\u003c\/a\u003e and request a quote from Creation Networks to plan your auditorium.\u003c\/p\u003e","brand":"Dolby Professional","offers":[{"title":"Default Title","offer_id":68118983508204,"sku":"SB218","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/dolby_sb218_persp_1.jpg?v=1794126702","url":"https:\/\/creationnetworks.net\/products\/dolby-sb218-dual-18-inch-cinema-subwoofer","provider":"Creation Networks","version":"1.0","type":"link"}