{"product_id":"6sn7gta-nos-sylvania-chrome-top-matched-quad-same-code-amplitrex-low-noise-tubes","title":"6SN7GTA NOS SYLVANIA CHROME TOP Matched Quad Same Code AMPLITREX Low Noise Tubes","description":"\u003cp class=\"p1\"\u003e\u003cb\u003e6SN7GTA NOS SYLVANIA – Chrome Top – Matched Quad – Same Data Codes – Made in USA 1954\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eAMPLITREX Tested – VERY STRONG – Low Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003e\u003cb\u003eDescription\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eWe present an excellent \u003cspan class=\"s1\"\u003e\u003cb\u003ematched quad of 6SN7GTA Sylvania NOS\u003c\/b\u003e\u003c\/span\u003e tubes, produced in the United States in 1954, belonging to the renowned \u003cspan class=\"s1\"\u003e\u003cb\u003eChrome Top\u003c\/b\u003e\u003c\/span\u003e variant, among the most sought after by enthusiasts.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThese tubes represent one of the most iconic expressions of Sylvania's 1950s production: extremely meticulous construction, high-quality materials, and sound performance that has made them a benchmark in the audio world.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eChrome Top\u003c\/b\u003e\u003c\/span\u003e is not only a distinctive aesthetic element but indicates high-level production, with excellent vacuum quality and operational stability over time.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003eTested with \u003cspan class=\"s2\"\u003e\u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\u003c\/span\u003e, they are \u003cb\u003eVERY STRONG and \u003c\/b\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eAn ideal selection for high-level hi-fi applications and for applications where maximum reliability is required.\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003e\u003cb\u003eSonic Character\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eBass: \u003c\/b\u003eDeep, solid, and well-controlled, with excellent structure and presence without excess.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eMidrange: \u003c\/b\u003eRich, three-dimensional, and natural. Vocals emerge with great realism and a typical American timbre, warm yet detailed.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eTreble: \u003c\/b\u003eSweet, refined, and well-extended. Never fatiguing, they contribute to a fluid and musical listening experience.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eDynamics: \u003c\/b\u003eWide and natural, with a fast yet always balanced response, capable of following every musical nuance.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eSoundstage: \u003c\/b\u003eWide and airy, with excellent instrument separation and a credible and deep scene.\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003e\u003cb\u003e🎧 Use in Hi-Fi Stereo Amplifiers\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p4\"\u003eSuitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eTube preamplifiers (even high-end)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDriver stages\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eOTL amplifiers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eThanks to their low noise and accurate selection, they are also suitable for the most sensitive positions in the circuit.\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003e\u003cb\u003e🎸 Use in Musical Amplifiers\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p4\"\u003ePerfect for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eInstrument amplifiers\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eTube preamplifiers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eThey offer a full, musical, and dynamic sound, with a particularly pleasing harmonic response.\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003e\u003cb\u003e🎯 Note for Audiophiles and Technicians\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p4\"\u003eThe \u003cspan class=\"s2\"\u003e\u003cb\u003eSylvania Chrome Top from the 1950s\u003c\/b\u003e\u003c\/span\u003e are particularly appreciated for their:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003etimbral balance\u003c\/li\u003e\n\u003cli class=\"p1\"\u003enatural musicality\u003c\/li\u003e\n\u003cli class=\"p1\"\u003elong-term reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eThis quad, thanks to its matching and test conditions, represents a high-level choice for both critical listening and high-end systems.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eAn NOS quad that combines historical prestige, build quality, and sound performance, ideal for those who want the best from the 6SN7 family.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 data-start=\"3046\" data-end=\"3436\"\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTubes tested on \u003cstrong\u003eAmplitrex AT-1000 Tube tester\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVa = 250V, Vg = -8V\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAverage 100% Gm = 2600 ; Ia = 9.0 mA\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cb style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eTest Result:\u003c\/b\u003e\u003cspan class=\"s3\" style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eVERY STRONG\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eTube #14\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eSection 1: Gm = 2500 ; Ia = 7.8 mA\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSection 2: Gm = 2600 ; Ia = 8.4 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eTube #13\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eSection 1: Gm = 2600 ; Ia = 7.5 mA\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSection 2: Gm = 2600 ; Ia = 7.8 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eTube #15\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eSection 1: Gm = 2600 ; Ia = 7.8 mA\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSection 2: Gm = 2600 ; Ia = 8.0 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eTube #3\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eSection 1: Gm = 2700 ; Ia = 8.4 mA\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSection 2: Gm = 2500 ; Ia = 7.6 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"p1\"\u003e\u003cb\u003eAdditional Tests:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eMicrophonics and noise:\u003c\/b\u003e\u003c\/span\u003e Tested and suitable for hi-fi use even in phono stages and guitar amplifiers. Also suitable for V1.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eBalance:\u003c\/b\u003e\u003c\/span\u003e The sections are consistent and well-aligned, making the tube also suitable for use as a phase inverter in hi-fi and instrumental applications.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eEmission:\u003c\/b\u003e\u003c\/span\u003e Excellent – Very strong and stable emission, without fluctuations.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cb\u003eShorts \/ Gas:\u003c\/b\u003e\u003cspan class=\"s1\"\u003e absent\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"p1\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eCondition:\u003c\/b\u003e\u003c\/span\u003e NOS - New Old Stock - Tested and functional - Supplied in our custom box for optimal protection.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eFunctionality:\u003c\/b\u003e\u003c\/span\u003e Perfectly operational\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eAesthetic condition:\u003c\/b\u003e\u003c\/span\u003e Excellent – Markings excellently preserved, minimal signs of aging. See photos for details.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cb\u003eManufacturing code:\u003c\/b\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e Sylvania Electric Products Inc., Emporium (PA) – code 413 → \u003c\/span\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\" class=\"s2\"\u003e\u003cb\u003e13th week of 1954\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"Perché le nostre valvole sono diverse – il protocollo VTT che migliora suono, affidabilità e durata\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":57192590737756,"sku":"03485","price":359.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_2a99fba4-024d-471d-a1d3-4a22af8aad93.jpg?v=1774626426","url":"https:\/\/vacuumtubestreasures.com\/en-nl\/products\/6sn7gta-nos-sylvania-chrome-top-matched-quad-same-code-amplitrex-low-noise-tubes","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}