{"product_id":"12ax7-ecc83-telefunken-matched-pair-tubes-smooth-plates-diamond-bottom-made-in-western-germany-copia-1","title":"12AX7 ECC83 TELEFUNKEN Matched Pair Tubes – Smooth Plates Diamond Bottom Made in Western Germany","description":"\u003cp\u003e\u003cstrong\u003e12AX7 ( ECC83 ) TELEFUNKEN Smooth Plates Diamond Bottom Matched Pair Tubes Made in Western Germany '60s\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSound Description:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"238\" data-end=\"740\"\u003eThe \u003cstrong data-start=\"241\" data-end=\"261\"\u003e12AX7 TELEFUNKEN\u003c\/strong\u003e , in this sought-after 1960s version with \u003cstrong data-start=\"311\" data-end=\"328\"\u003eSmooth Plates\u003c\/strong\u003e , \u003cstrong data-start=\"330\" data-end=\"351\"\u003eDiamond \u0026lt;\u0026gt; Bottom\u003c\/strong\u003e , represents one of the highest standards of European tube production.\u003cbr data-start=\"452\" data-end=\"455\"\u003eCrafted at the historic Ulm factory, this select pair combines \u003cstrong data-start=\"538\" data-end=\"562\"\u003erefined musicality\u003c\/strong\u003e , \u003cstrong data-start=\"564\" data-end=\"589\"\u003elow noise\u003c\/strong\u003e and \u003cstrong data-start=\"592\" data-end=\"623\"\u003eimpeccable tonal coherence\u003c\/strong\u003e , making it an ideal choice for audiophile applications, recording studios and reference hi-fi equipment.\u003c\/p\u003e\n\u003cp data-start=\"742\" data-end=\"944\"\u003e\u003cstrong data-start=\"742\" data-end=\"751\"\u003eBass\u003c\/strong\u003e : Fast, dry, and defined. The low end is tight and articulate, without artificial bloat. It provides a clean, solid foundation, perfect for systems that prioritize precision and control.\u003c\/p\u003e\n\u003cp data-start=\"946\" data-end=\"1222\"\u003e\u003cstrong data-start=\"946\" data-end=\"954\"\u003eMids\u003c\/strong\u003e : Transparent, fluid, and three-dimensional. Voices emerge with naturalness and presence, while acoustic instruments are reproduced with balance and realism. The Telefunken midrange is known for its elegance and ability to reveal subtleties without overemphasis.\u003c\/p\u003e\n\u003cp data-start=\"1224\" data-end=\"1422\"\u003e\u003cstrong data-start=\"1224\" data-end=\"1232\"\u003eHighs\u003c\/strong\u003e : Refined, detailed, and never fatiguing. The upper range is bright but free of harshness, with a natural openness that adds air and spaciousness to the scene without becoming intrusive.\u003c\/p\u003e\n\u003cp data-start=\"1424\" data-end=\"1697\"\u003e\u003cstrong data-start=\"1424\" data-end=\"1436\"\u003eDynamics\u003c\/strong\u003e : controlled, precise, and progressive. The response to microdetails is extraordinary, with a smooth and coherent rendition of the most complex excursions. The tube maintains composure even in the presence of fast passages or recordings rich in transients.\u003c\/p\u003e\n\u003cp data-start=\"1699\" data-end=\"1904\"\u003e\u003cstrong data-start=\"1699\" data-end=\"1713\"\u003eSoundstage\u003c\/strong\u003e : Wide, coherent, and well-layered. The stereo image is focused, with clear separation of sound planes and stable spatial reproduction, resulting in a believable and natural soundstage.\u003c\/p\u003e\n\u003cp data-start=\"1906\" data-end=\"2243\"\u003eThe \u003cstrong data-start=\"1909\" data-end=\"2008\"\u003e12AX7 TELEFUNKEN – Smooth Plates – Diamond Bottom – Made in Western Germany '60s\u003c\/strong\u003e is one of the most highly regarded tubes in the history of audio. Synonymous with \u003cstrong data-start=\"2081\" data-end=\"2145\"\u003eGerman precision, tonal neutrality and legendary durability\u003c\/strong\u003e , it is the choice of choice for those seeking \u003cstrong data-start=\"2184\" data-end=\"2242\"\u003etransparency, micro-detail and long-term consistency\u003c\/strong\u003e .\u003c\/p\u003e\n\u003cp data-start=\"2245\" data-end=\"2305\"\u003e🎧 \u003cstrong data-start=\"2248\" data-end=\"2305\"\u003eUse in Headphone Amplifiers and Hi-Fi Driver Stages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2307\" data-end=\"2655\"\u003ePerfect for high-resolution tube preamps, DACs with tube analog stages, OTLs, or reference headphone amplifiers. Particularly suitable for use with models such as \u003cstrong data-start=\"2498\" data-end=\"2513\"\u003ethe Focal Clear\u003c\/strong\u003e , \u003cstrong data-start=\"2515\" data-end=\"2529\"\u003eZMF Atrium\u003c\/strong\u003e , \u003cstrong data-start=\"2531\" data-end=\"2552\"\u003eSennheiser HD800S\u003c\/strong\u003e , or \u003cstrong data-start=\"2555\" data-end=\"2571\"\u003eHifiman Arya\u003c\/strong\u003e , for a neutral yet engaging performance with excellent headroom and microdynamics.\u003c\/p\u003e\n\u003cp data-start=\"2657\" data-end=\"2705\"\u003e🎸 \u003cstrong data-start=\"2660\" data-end=\"2705\"\u003eUse in Guitar and Bass Amplifiers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2707\" data-end=\"3067\"\u003eIn the preamp sections of \u003cstrong data-start=\"2745\" data-end=\"2757\"\u003eMarshall\u003c\/strong\u003e , \u003cstrong data-start=\"2759\" data-end=\"2769\"\u003eHiwatt\u003c\/strong\u003e , or \u003cstrong data-start=\"2772\" data-end=\"2794\"\u003eFender Custom Shop\u003c\/strong\u003e amplifiers, the TELEFUNKEN 12AX7 guarantees a clean, dynamic, and noise-free response, ideal for both studio recording and live performance where clarity and definition are essential. The attack is prompt but not aggressive, with natural harmonics and well-controlled sustain.\u003c\/p\u003e\n\u003cp data-start=\"3069\" data-end=\"3285\"\u003e🎯 \u003cstrong data-start=\"3072\" data-end=\"3104\"\u003eNote for audiophiles and technicians\u003c\/strong\u003e\u003cbr data-start=\"3104\" data-end=\"3107\"\u003eAn absolute reference pair for those who want \u003cstrong data-start=\"3159\" data-end=\"3201\"\u003eneutrality, definition and reliability\u003c\/strong\u003e , both in critical reproduction systems and in top-level audio systems.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTested on AMPLITREX AT-1000 Tube Tester\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVoltage Test:\u003cspan\u003e\u0026nbsp;\u003c\/span\u003e\u003c\/strong\u003eVa = 250V, Vg = -2V\u003cstrong\u003e \u003cbr\u003eAverage 100%:\u003cspan\u003e\u0026nbsp;\u003c\/span\u003eGm = 1600 ; Ia = 1.2 mA \u003cstrong\u003e\u003cbr\u003eTEST RESULT:\u003cspan\u003e\u0026nbsp;\u003c\/span\u003e\u003c\/strong\u003eVERY STRONG\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve 1\u003c\/strong\u003e :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSection 1\u003c\/strong\u003e : Gm = 1500; Ia = 0.9 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2\u003c\/strong\u003e : Gm = 1500; Ia = 1.0 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eValve 2\u003c\/strong\u003e :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSection 1\u003c\/strong\u003e : Gm = 1500; Ia = 0.8 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2\u003c\/strong\u003e : Gm = 1400; Ia = 0.7 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low. Tested and approved for use in hi-fi and guitar amplifiers, including V1.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e The sections show a slight deviation in values; excellent for use in hi-fi and musical applications (guitar).\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – Very strong and stable output, no fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Vintage tubes - Tested and in perfect working order. Shipped in our custom box for optimal protection.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAesthetic condition:\u003c\/strong\u003e \u003cspan\u003eFair – Writing almost completely faded, with obvious signs of wear on the glass or feet. See photos for details.\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e None – Telefunken Made in Germany, identifiable by construction features. 1960s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"Why our tubes are different – the VTT protocol that improves sound, reliability and durability\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"TELEFUNKEN","offers":[{"title":"Default Title","offer_id":55533490930012,"sku":"03146","price":219.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_dc7ab872-6deb-442b-bf95-67eef950699c.jpg?v=1758523590","url":"https:\/\/vacuumtubestreasures.com\/en-fr\/products\/12ax7-ecc83-telefunken-matched-pair-tubes-smooth-plates-diamond-bottom-made-in-western-germany-copia-1","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}