{"product_id":"dolby-system-128-screen-channel-speaker-system","title":"Dolby System 128 – Screen Channel Speaker System","description":"\u003ch2\u003eWhat is the Dolby System 128?\u003c\/h2\u003e\n\u003cp\u003eThe Dolby System 128 is a bi-amplified screen channel speaker system for medium-sized immersive cinema auditoriums. It stacks one CS128MH mid\/high loudspeaker on one CS128LF low-frequency loudspeaker. A patented asymmetrical waveguide, 75 mm titanium dome HF driver and two 15-inch woofers deliver 39 Hz to 20 kHz response with 131 dB maximum summed continuous SPL.\u003c\/p\u003e\n\n\u003ch2\u003eHow does the Dolby System 128 work?\u003c\/h2\u003e\n\u003cp\u003eThe System 128 is bi-amplified: the cinema processor sends separate mid\/high and low-frequency feeds to two amplifier channels, one for the CS128MH and one for the CS128LF. The CS128MH contains a passive crossover between its 12-inch woofer and titanium dome, so the stack needs a minimum of two amplifier channels.\u003c\/p\u003e\n\u003cp\u003eThe CS128MH's asymmetrical waveguide spans 60° at the top and 120° at the bottom horizontally, with 60° vertical, so the rear of the room gets more level while front rows get wider, softer coverage. Its 12-inch driver uses an aluminum demodulation ring to reduce distortion. The CS128LF holds two 15-inch woofers in independent chambers that run in parallel at 4 ohms or individually at 8 ohms through a flip-card input, rated at 600 W @ 49 Vrms.\u003c\/p\u003e\n\u003cp\u003eAt 13.4 inches (340 mm) deep with laterally mounted input plates, the stack suits tight screen walls. Drive it from a \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-atmos-cinema-processor-cp950a\"\u003eDolby CP950A\u003c\/a\u003e or \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-cp950-audio-processor\"\u003eCP950\u003c\/a\u003e with Dolby Multichannel Amplifiers such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/dolby-professional-dma32301-32-channels-multichannel-amplifier\"\u003eDMA24302\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eWhat are the key features of the Dolby System 128?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented asymmetrical waveguide\u003c\/strong\u003e — 60° top \/ 120° bottom horizontal coverage provides even volume shading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 mm titanium dome HF driver\u003c\/strong\u003e — low-distortion response up to 20 kHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-inch MF driver with demodulation ring\u003c\/strong\u003e — cooling-optimized motor and aluminum ring reduce distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 15-inch LF section\u003c\/strong\u003e — the CS128LF flip card selects parallel or independent drive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShallow 13.4-inch depth\u003c\/strong\u003e — laterally mounted input plates simplify installation and service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in handles\u003c\/strong\u003e — tuned port cutouts double as handles during unpacking and installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhere is the Dolby System 128 typically used?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCinema auditorium (medium)\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\u003eComponents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e(1) CS128MH mid\/high, (1) CS128LF low-frequency\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;\"\u003e39 Hz - 20 kHz\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;\"\u003e32 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eCS128MH coverage (asymmetrical)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e60° top H, 120° bottom H, 60° V\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;\"\u003eCS128MH: 8 Ohms; CS128LF: 4 Ohms parallel \/ 8 Ohms x 2 (independent)\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;\"\u003eCS128MH: 101 dB; CS128LF: 101 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;\"\u003eCS128MH: 300 W @ 49 Vrms; CS128LF: 600 W @ 49 Vrms\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;\"\u003eCS128MH: 126 dB; CS128LF: 129 dB; system summed: 131 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eAdvanced input plates w\/ high-current spring-loaded terminal blocks (LF with flip card)\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.FLR floor bracket kit (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e70.80\" H x 32.74\" W x 13.4\" D (179.8 x 83.2 x 34 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eWeight (system stack)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e186 lb (84.37 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\u003eWhat makes up the System 128?\u003c\/h3\u003e\n\u003cp\u003eOne CS128MH mid\/high speaker and one CS128LF low-frequency speaker. Dolby also lists each as a separate product for replacements or custom layouts.\u003c\/p\u003e\n\u003ch3\u003eHow many amplifier channels does it need?\u003c\/h3\u003e\n\u003cp\u003eAt least two: one for the CS128MH, which has an internal passive crossover, and one for the CS128LF. The CS128LF can also be split across two channels in independent mode.\u003c\/p\u003e\n\u003ch3\u003eIs the System 128 compatible with Dolby Atmos and the CP950A?\u003c\/h3\u003e\n\u003cp\u003eYes. It is part of Dolby's immersive screen speaker line and runs from processors such as the CP950A with Dolby Multichannel Amplifiers.\u003c\/p\u003e\n\u003ch3\u003eHow does it differ from the System 126?\u003c\/h3\u003e\n\u003cp\u003eSystem 128 uses the larger CS128MH with a 12-inch woofer and 75 mm titanium dome for 131 dB summed output, while System 126 uses the CS126MH and can run passively on one channel with the PXO.126.\u003c\/p\u003e\n\u003ch3\u003eWhat warranty and support come with it?\u003c\/h3\u003e\n\u003cp\u003eThe System 128 carries Dolby's manufacturer warranty, confirmed with your quote. Creation Networks designs, installs and tunes Dolby screen systems; see the \u003ca href=\"https:\/\/creationnetworks.net\/collections\/dolby-professional\"\u003eDolby Professional collection\u003c\/a\u003e and request a quote.\u003c\/p\u003e","brand":"Dolby Professional","offers":[{"title":"Default Title","offer_id":68118994714860,"sku":"SYS128","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/sys128.jpg?v=1794127026","url":"https:\/\/creationnetworks.net\/products\/dolby-system-128-screen-channel-speaker-system","provider":"Creation Networks","version":"1.0","type":"link"}