{"product_id":"dolby-sb218xl-dual-18-inch-plf-cinema-subwoofer","title":"Dolby SB218XL – Dual 18-Inch PLF Cinema Subwoofer","description":"\u003ch2\u003eWhat is the Dolby SB218XL?\u003c\/h2\u003e\n\u003cp\u003eThe Dolby SB218XL is a dual 18-inch, front-loaded subwoofer designed for premium large-format (PLF) cinema auditoriums. It produces deep, clean sub-bass for the LFE channel in Dolby Atmos, Dolby Surround 7.1 and 5.1 rooms. Two pro-audio 18-inch drivers with 4-inch voice coils and up to 48 mm of peak-to-peak excursion give it Dolby's highest subwoofer output, rated at 1600 W.\u003c\/p\u003e\n\n\u003ch2\u003eHow does the Dolby SB218XL work?\u003c\/h2\u003e\n\u003cp\u003eThe SB218XL is a passive cabinet driven by external amplifier channels using Dolby's required high-pass and low-pass processing. Each driver has its own acoustic chamber and port, which improves performance and structural integrity. An aluminum demodulation ring and optimized cooling system in each driver reduce distortion at high drive levels.\u003c\/p\u003e\n\u003cp\u003eThe advanced input plate carries a high-current, spring-loaded terminal block and a flip-card PCB. Flipping the card selects parallel 4-ohm operation on one amplifier channel or independent 8-ohm drive of each woofer, without opening the cabinet. Rated at 1600 W @ 80 Vrms with an 1140 W measured power draw, the SB218XL reaches 134 dB continuous and 144 dB measured peak SPL at one metre, with response from 22 Hz to 170 Hz and usable output to 19 Hz.\u003c\/p\u003e\n\u003cp\u003eThe LFE signal typically comes from a \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-atmos-cinema-processor-cp950a\"\u003eDolby CP950A Atmos cinema processor\u003c\/a\u003e, with amplification from a Dolby Multichannel Amplifier such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-professional-32-channels-dma32301-multichannel-amplifier\"\u003eDMA32301\u003c\/a\u003e. Two cabinets can be stacked using the rubber feet and indexing recesses, and the BKT.136 tie plates and BKT.FLR floor brackets (sold separately) lock the stack together and to the floor.\u003c\/p\u003e\n\n\u003ch2\u003eWhat are the key features of the Dolby SB218XL?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePLF-grade dual 18-inch drivers\u003c\/strong\u003e — 4-inch voice coils with up to 48 mm of peak-to-peak excursion deliver the impact premium large-format rooms demand.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlip-card input plate\u003c\/strong\u003e — one card selects parallel or independent wiring without opening the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividual chambers and porting\u003c\/strong\u003e — each driver has its own chamber and port for better performance, structural integrity and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-distortion motor design\u003c\/strong\u003e — an aluminum demodulation ring and optimized cooling keep distortion down at high output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-high stacking\u003c\/strong\u003e — rubber feet, indexing recesses and threaded inserts support a secure two-unit stack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalance-centered handles\u003c\/strong\u003e — handles placed at the balance point make it easier to unpack and position the 207.5 lb cabinet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhere is the Dolby SB218XL typically used?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePremium large-format 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\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;\"\u003eSB218XL\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;\"\u003e22 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;\"\u003e19 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 \/ 8 Ohms independent drive\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;\"\u003e1600 W @ 80 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;\"\u003e1140 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;\"\u003e200 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;\"\u003e134 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;\"\u003e144 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 128.26 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;\"\u003e207.5 lb (94.1 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;\"\u003e225.5 lb (102.3 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 SB218XL compatible with Dolby Atmos and the CP950A?\u003c\/h3\u003e\n\u003cp\u003eYes. Dolby designed the SB218XL for the LFE channel in Dolby Atmos, Dolby Surround 7.1 and 5.1 auditoriums, fed from a Dolby cinema processor such as the CP950A or \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-cp950-audio-processor\"\u003eCP950\u003c\/a\u003e through external amplification.\u003c\/p\u003e\n\u003ch3\u003eCan one amplifier channel drive the SB218XL?\u003c\/h3\u003e\n\u003cp\u003eYes. In parallel mode the cabinet presents 4 ohms to a single channel. Set the flip card to independent mode to drive each woofer at 8 ohms from separate channels.\u003c\/p\u003e\n\u003ch3\u003eHow many SB218XL cabinets can be stacked?\u003c\/h3\u003e\n\u003cp\u003eDolby allows two units per stack, coupled with BKT.136 tie plates and anchored with BKT.FLR floor brackets (both sold separately). Read the owner's manual before mounting.\u003c\/p\u003e\n\u003ch3\u003eHow does the SB218XL differ from the SB218?\u003c\/h3\u003e\n\u003cp\u003eThe SB218XL is the PLF model, rated at 1600 W with 19 Hz usable response and a flip-card input. The SB218 is rated at 1200 W with 22 Hz usable response for mainstream auditoriums.\u003c\/p\u003e\n\u003ch3\u003eWhat warranty and support are available?\u003c\/h3\u003e\n\u003cp\u003eThe SB218XL carries Dolby's manufacturer warranty, and Creation Networks confirms the current terms with your quote. Creation Networks designs, installs and supports complete Dolby cinema systems; browse the \u003ca href=\"https:\/\/creationnetworks.net\/collections\/dolby-professional\"\u003eDolby Professional collection\u003c\/a\u003e or request a quote.\u003c\/p\u003e","brand":"Dolby Professional","offers":[{"title":"Default Title","offer_id":68118984982764,"sku":"SB218XL","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/sb218xl-subwoofer-card-image.png?v=1794126770","url":"https:\/\/creationnetworks.net\/products\/dolby-sb218xl-dual-18-inch-plf-cinema-subwoofer","provider":"Creation Networks","version":"1.0","type":"link"}