{"id":7556,"date":"2017-08-06T22:53:06","date_gmt":"2017-08-06T20:53:06","guid":{"rendered":"https:\/\/news.audio-technica.fr\/?p=64"},"modified":"2017-08-06T22:53:06","modified_gmt":"2017-08-06T20:53:06","slug":"100-volts-versus-basse-impedance","status":"publish","type":"post","link":"https:\/\/distribution.audio-technica.eu\/fr-fr\/actualites\/100-volts-versus-basse-impedance\/","title":{"rendered":"100 Volts versus basse imp\u00e9dance"},"content":{"rendered":"<p>Une installation basse imp\u00e9dance permet de brancher des haut-parleurs directement \u00e0 l&rsquo;amplificateur. Cependant elle demande beaucoup de pr\u00e9cautions des points de vue puissance et imp\u00e9dance.<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-69 alignright\" src=\"\/fr\/wp-content\/uploads\/sites\/3\/Diapositive1-300x169.jpg\" alt=\"\" width=\"300\" height=\"169\" \/> En particulier il est \u00e0 prendre en compte les c\u00e2bles de raccordement de part leur nature et leur longueur qui peuvent influer fortement sur le fonctionnement. Ainsi d\u00e8s que les distances sont importantes, l\u2019\u00e9nergie perdue dans les c\u00e2bles peut \u00eatre plus importante que celle consomm\u00e9e par le HP, en un mot la moiti\u00e9 de votre puissance s\u2019\u00e9vapore pour rien.<\/p>\n<p>C\u2019est pour cela que la technique haute imp\u00e9dance dite Ligne 100 Volts est pr\u00e9f\u00e9r\u00e9e en sonorisation publique ( Public Address).\u00a0 Le principe en est simple \u00e0 l\u2019instar du transport \u00e9lectrique tr\u00e8s haute tension, jusqu&rsquo;\u00e0 400 000 volts pour s\u2019affranchir des grandes distances, EDF abaisse ensuite cette tension dans des transformateurs avant de distribuer du 240 volts \u00e0 l&rsquo;utilisateur. Ainsi en 100 Volts, on place un transformateur \u00e0 la sortie de l&rsquo;ampli pour augmenter la tension, et on utilise de l&rsquo;autre cot\u00e9 de la ligne, un transformateur qui rabaisse la tension dans chaque haut parleur.<\/p>\n<p>La technique 100 Volts impose donc l\u2019utilisation de transformateurs sur toute la cha\u00eene, ce qui g\u00e9n\u00e8re un surco\u00fbt et a priori des effets \u00e9lectroniques sur le signal, mais permet des installations qui demandent des longueurs de c\u00e2bles cons\u00e9quentes, sans compter d\u2019autres avantages mais nous en parlerons un autre jour. Par contre elle ne permet pas le st\u00e9r\u00e9o du fait du nombre de HP et de leur r\u00e9partition g\u00e9ographique.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une installation basse imp\u00e9dance permet de brancher des haut-parleurs directement \u00e0 l&rsquo;amplificateur. Cependant elle demande beaucoup de pr\u00e9cautions des points de vue puissance et imp\u00e9dance. En particulier il est \u00e0 prendre en compte les c\u00e2bles de raccordement de part leur nature et leur longueur qui peuvent influer fortement sur le fonctionnement. Ainsi d\u00e8s que les [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7509,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1905],"tags":[1911,1944],"class_list":["post-7556","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apart-audio","tag-100v","tag-basse-impedance"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>100 Volts versus basse imp\u00e9dance - FR Audio-Technica Distribution<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/distribution.audio-technica.eu\/fr-fr\/actualites\/100-volts-versus-basse-impedance\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"100 Volts versus basse imp\u00e9dance - FR Audio-Technica Distribution\" \/>\n<meta property=\"og:description\" content=\"Une installation basse imp\u00e9dance permet de brancher des haut-parleurs directement \u00e0 l&rsquo;amplificateur. 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