{"product_id":"12av7-nos-nib-sylvania-black-square-plates-halo-getter-matched-tubes-made-in-usa","title":"12AV7 NOS NIB SYLVANIA Tested Tubes – Black Square Plates Halo Getter USA","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e12AV7 NOS NIB SYLVANIA Black Square Plates Halo Getter Matched Tubes\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eMade in USA\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e \u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eThe price refers to a selected valve (1 Valve)\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003e These tubes offer a particularly balanced and versatile sound, ideal for Hi-Fi audio applications and guitar amplifiers. The black square plates on these tubes provide a rich and articulated sound response, with a smooth and well-defined midrange. The bass is deep and controlled, without being excessive, providing a solid and well-structured sound foundation. The high frequencies are distinguished by remarkable clarity and precision, while maintaining a sweetness that prevents fatigue even after extended listening sessions. Their soundstage is wide and three-dimensional, with accurate instrument separation that allows you to appreciate every detail of the recording. These tubes are an excellent choice for those seeking a sound reproduction with a perfect balance between vintage warmth and a clear and transparent presentation.\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eProduced by SYLVANIA - USA.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e Tested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube tester:\u003cbr\u003e \u003cspan\u003eVoltage Test: Va = 150V, Vg = -1V\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eAverage 100% Gm = 8.5 ; Ia = 18 mA\u003c\/span\u003e\u003cbr\u003e \u003cstrong\u003eTEST RESULT: VERY STRONG\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eFurther tests performed:\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eMicrophone Test\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eEmission Quality\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eShort Circuit Test\u003c\/span\u003e\u003cbr\u003e GAS Test\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Why our tubes are different – ​​the VTT protocol that improves sound, reliability and durability\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":49481688121692,"sku":"02468U","price":14.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_89ebeb84-9572-4e5b-8434-65530d82dbc9.jpg?v=1728057486","url":"https:\/\/vacuumtubestreasures.com\/en-de\/products\/12av7-nos-nib-sylvania-black-square-plates-halo-getter-matched-tubes-made-in-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}