{"product_id":"listen-technologies-ls-57-216-listen-idsp-advanced-level-ii-stationary-rf-system-216-mhz","title":"Listen Technologies LS-57-216 – iDSP Advanced Level II Stationary RF System","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Listen Technologies LS-57-216 is a Listen iDSP Advanced Level II stationary RF assistive listening system operating on 216 MHz. It ships as a complete package of stationary transmitter, intelligent DSP receivers and listening accessories, sized so a venue can meet an ADA assistive listening obligation from a single part number. The transmitter accepts a line level feed from a mixer or DSP output. RF remains the default choice where coverage has to extend beyond one room or through building structure that would block infrared.\u003c\/p\u003e\u003ch2\u003eProduct Description\u003c\/h2\u003e\u003cp\u003eRF assistive listening covers an area rather than a line of sight. That makes it the right technology for auditoriums, houses of worship and multi-purpose rooms where listeners move, and the wrong technology where confidentiality matters, since RF passes through walls.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/LS-57-216_Composite-01_2022-WEB-W.jpg?v=1787627362\" alt=\"Listen Technologies LS-57-216 iDSP Advanced Level II stationary RF assistive listening system\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003eThis system operates on 216 MHz. The 72 MHz band is the long-standing US assistive listening allocation; 216 MHz offers additional channels where 72 MHz is congested or where a venue runs multiple simultaneous channels for interpretation. Confirm band choice against the local RF environment rather than defaulting, particularly in dense urban installations or venues near broadcast infrastructure.\u003c\/p\u003e\u003cp\u003eThe transmitter takes a line level feed, which suits rooms where the assistive listening send comes off a mixer auxiliary or a DSP output. Keep that send pre-fader where the room volume is adjusted during a session, so listeners are not affected by front-of-house level changes.\u003c\/p\u003e\u003cp\u003eAntenna cable and terminations are ordered separately for stationary installations: \u003ca href=\"https:\/\/creationnetworks.net\/products\/listen-technologies-la-112-500-rg-58-50-ohm-coaxial-cable-500-ft\"\u003eRG-58 50 ohm coaxial cable\u003c\/a\u003e, \u003ca href=\"https:\/\/creationnetworks.net\/products\/listen-technologies-la-127-rg-58-bnc-connector\"\u003eBNC connectors\u003c\/a\u003e and \u003ca href=\"https:\/\/creationnetworks.net\/products\/listen-technologies-la-115-bnc-coupler\"\u003eBNC couplers\u003c\/a\u003e where a run has to be joined. Venues running multiple transmitters onto a shared antenna need a \u003ca href=\"https:\/\/creationnetworks.net\/products\/listen-technologies-la-81-4-way-rf-antenna-combiner\"\u003e4-way\u003c\/a\u003e or \u003ca href=\"https:\/\/creationnetworks.net\/products\/listen-technologies-la-82-6-way-rf-antenna-combiner\"\u003e6-way RF antenna combiner\u003c\/a\u003e. Signage is a compliance requirement, covered by the \u003ca href=\"https:\/\/creationnetworks.net\/products\/listen-technologies-la-304-assistive-listening-notification-signage-kit\"\u003eassistive listening notification signage kit\u003c\/a\u003e, and receiver issue is usually logged in a \u003ca href=\"https:\/\/creationnetworks.net\/products\/listen-technologies-la-904-listen-dispensing-log-book\"\u003edispensing log book\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete iDSP Advanced Level II system\u003c\/strong\u003e — Ships as transmitter, receivers and listening accessories under one part number.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e216 MHz operation\u003c\/strong\u003e — Uses the assistive listening band appropriate to the venue's RF environment and channel needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine level audio input\u003c\/strong\u003e — Accepts a mixer auxiliary or DSP output send.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntelligent DSP receivers\u003c\/strong\u003e — Digital signal processing in the receiver improves intelligibility over analog RF designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArea coverage\u003c\/strong\u003e — Covers a room or building zone rather than a line of sight, unlike infrared.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eADA obligation package\u003c\/strong\u003e — Sized so a venue can meet a receiver count requirement from a single order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStationary transmitter\u003c\/strong\u003e — Built for permanent rack or shelf installation rather than portable use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAuditorium\u003c\/li\u003e\n\u003cli\u003eHouse of worship\u003c\/li\u003e\n\u003cli\u003eConference room\u003c\/li\u003e\n\u003cli\u003eBoardroom\u003c\/li\u003e\n\u003cli\u003eGovernment space\u003c\/li\u003e\n\u003cli\u003eTraining room\u003c\/li\u003e\n\u003cli\u003eMulti-purpose room\u003c\/li\u003e\n\u003cli\u003eAll-hands room\u003c\/li\u003e\n\u003cli\u003eCommercial meeting space\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:440px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px;border-bottom:1px solid #ddd;\"\u003eManufacturer\u003c\/th\u003e\n\u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eListen Technologies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px;border-bottom:1px solid #ddd;\"\u003ePart Number\u003c\/th\u003e\n\u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eLS-57-216\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px;border-bottom:1px solid #ddd;\"\u003eSystem Type\u003c\/th\u003e\n\u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eListen iDSP Advanced Level II stationary RF assistive listening system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px;border-bottom:1px solid #ddd;\"\u003eOperating Band\u003c\/th\u003e\n\u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003e216 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px;border-bottom:1px solid #ddd;\"\u003eAudio Input\u003c\/th\u003e\n\u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eLine level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px;border-bottom:1px solid #ddd;\"\u003eTransmitter Type\u003c\/th\u003e\n\u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eStationary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px;border-bottom:1px solid #ddd;\"\u003eReceiver Type\u003c\/th\u003e\n\u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eIntelligent DSP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px;border-bottom:1px solid #ddd;\"\u003eSupplied As\u003c\/th\u003e\n\u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eComplete system: transmitter, receivers and listening accessories\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\u003cp\u003e\u003cem\u003eSpecifications sourced from the Listen Technologies product listing. Receiver quantity and accessory content vary by system level; confirm the pack contents against your ADA receiver count before ordering.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHow many receivers does the system include?\u003c\/strong\u003e\u003cbr\u003e\nReceiver quantity varies by system level. Confirm the pack contents against the receiver count your ADA obligation requires, which is derived from seating capacity rather than room area.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould I specify 72 MHz or 216 MHz?\u003c\/strong\u003e\u003cbr\u003e\n72 MHz is the long-standing US assistive listening allocation. 216 MHz provides additional channels where 72 MHz is congested or where multiple simultaneous channels are needed. Check the local RF environment rather than defaulting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the transmitter take a networked audio feed?\u003c\/strong\u003e\u003cbr\u003e\nThis configuration uses a line level input. Dante variants are available where the feed should come from the audio network.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes RF coverage pass through walls?\u003c\/strong\u003e\u003cbr\u003e\nYes, which is what makes it suitable for multi-room and balcony coverage. It also means RF is the wrong choice where confidentiality is required, such as a courtroom or a boardroom handling sensitive material. Infrared is specified in those cases.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat antenna infrastructure is required?\u003c\/strong\u003e\u003cbr\u003e\nA stationary installation uses 50 ohm coaxial cable to a remote antenna, with BNC terminations. Where several transmitters share one antenna, an RF combiner is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the installation verified?\u003c\/strong\u003e\u003cbr\u003e\nCoverage is checked across the listening area with a receiver, confirming signal quality at the seating extremes and any balcony or overflow position.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat warranty and support apply?\u003c\/strong\u003e\u003cbr\u003e\nWarranty duration and technical support terms are set by Listen Technologies. Contact Creation Networks for current terms, RMA handling and pre-sales design support.\u003c\/p\u003e","brand":"Listen Technologies","offers":[{"title":"Default Title","offer_id":48228834181356,"sku":"LS-57-216","price":2572.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/LS-57-216_Composite-01_2022-WEB-W.jpg?v=1787627362","url":"https:\/\/creationnetworks.net\/products\/listen-technologies-ls-57-216-listen-idsp-advanced-level-ii-stationary-rf-system-216-mhz","provider":"Creation Networks","version":"1.0","type":"link"}