{"product_id":"rcf-hd-21en","title":"RCF HD 21EN Passive Horn Speaker For Public Address and Alarm Systems","description":"\u003cp\u003eThe RCF HD 21EN is engineered for systems integrators and AV professionals specifying permanent installed public address, mass notification, and emergency voice alarm systems. Its EN54-24 certification makes it a code-compliant choice for life-safety installations including evacuation systems in stadiums, transit facilities, warehouses, and large public venues where regulatory compliance is non-negotiable. The 100V constant-voltage architecture fits directly into distributed audio networks driven by compatible line-level amplifiers.\u003c\/p\u003e\u003cp\u003eWhere competitive horn speakers rely on standard plastic or bare metal termination, the HD 21EN uses ceramic screw terminal blocks for both input and output connections, providing flameproof cable termination suited for high-temperature or fire-risk environments. A built-in thermal fuse protects line integrity if heat compromises the enclosure. The ABS body paired with a stainless steel adjustable wall-mount bracket allows precise aiming across wide coverage angles without corrosion risk in exposed outdoor installations.\u003c\/p\u003e\u003cp\u003eFour selectable 100V power taps give system designers the flexibility to balance coverage and drive requirements across zones without rewiring. The wide 135-degree coverage angle and high sensitivity make the HD 21EN a practical long-throw option where intelligible voice reproduction over distance is the primary performance requirement.\u003c\/p\u003e","brand":"RCF USA, Inc.","offers":[{"title":"Default Title","offer_id":53426574229688,"sku":"205429","price":209.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/205429_RCF-HD-21EN-Passive-Horn-Speaker-For-Public-Address-and-Alarm-Systems_ALT01sqr.jpg?v=1786580558","url":"https:\/\/soundpro.com\/products\/rcf-hd-21en","provider":"SoundPro","version":"1.0","type":"link"}