{"product_id":"12av7-nos-nib-sylvania-black-wing-plates-halo-getter-tested-tube-made-in-usa-copia","title":"12AV7 NOS NIB Sylvania – Black Wing Plates Square Getter Tested Tube USA 1950s","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e12AV7 NOS NIB SYLVANIA Black Wing Plates Square Getter Tested Tube\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eMade in USA '50s\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e These tubes, manufactured in the United States in the 1950s, offer a sound that perfectly embodies the vintage character of that era. They are particularly appreciated for their ability to deliver a warm and detailed sound, with a rich and full midrange, ideal for audio applications requiring an immersive and musical sound experience.\u003c\/p\u003e\n\u003cp\u003e The black \"wing\"-shaped plates deliver a natural harmonic response, with deep, rounded bass that creates a solid and controlled foundation, without ever being intrusive. The high frequencies are delicate yet precise, offering a crystal-clear presentation that allows you to capture every musical nuance without ever causing listening fatigue. Their soundstage is wide and airy, with excellent separation between instruments that guarantees a three-dimensional rendering and great depth.\u003c\/p\u003e\n\u003cp\u003e Compared to the Halo Getter version, the Square Getter adds an extra level of stability to the sound, maintaining an overall balanced tone but with a slightly denser timbre. These tubes are an ideal choice for those seeking a vintage sound with warmth and refinement, perfectly suited to those seeking a listening experience that captures the charm of the golden era of tube audio.\u003c\/p\u003e\n\u003cp\u003e \u003cspan data-mce-fragment=\"1\"\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 data-mce-fragment=\"1\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eVoltage Test: Va = 150V, Vg = -1V\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eAverage 100% Gm = 8.5 ; Ia = 18 mA\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e \u003cstrong\u003eTEST RESULT: VERY STRONG\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e Section 1: Gm = 9.8 ; Ia = 22 mA\u003cbr\u003e Section 2: Gm = 9.6 ; Ia = 22 mA\u003c\/p\u003e\n\u003cp\u003e \u003cspan data-mce-fragment=\"1\"\u003eFurther tests performed:\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eMicrophone Test\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eEmission Quality\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eShort Circuit Test\u003c\/span\u003e\u003cbr\u003e GAS Test\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":49481875390812,"sku":"02470R","price":14.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/3_95e542ba-0d62-42d6-88cf-c11506b11423.jpg?v=1728059487","url":"https:\/\/vacuumtubestreasures.com\/en-de\/products\/12av7-nos-nib-sylvania-black-wing-plates-halo-getter-tested-tube-made-in-usa-copia","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}