{"product_id":"6as7ga-6080-ge-nos-nib-black-plate-green-print-matched-pair-amplitrex-tested-copia","title":"6AS7GA GE NOS NIB Military Green Label Matched Quad for OTL Amplifiers – Direct 6080 Replacement – AMPLITREX Tested USA ’86","description":"\u003ch3 class=\"p1\"\u003e\u003cstrong\u003e6AS7GA GE NOS NIB Military Green Label Matched Quad for OTL Amplifiers – Direct 6080 Replacement – AMPLITREX Tested USA ’86\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis quartet is designed for OTL amplifiers, high-current stereo amplifiers, or configurations employing four output tubes, where electrical uniformity, operational stability, and consistency among all tubes significantly contribute to overall performance and channel balance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eOne of the last true \u003cstrong\u003emilitary-grade American 6AS7GA tubes\u003c\/strong\u003e, specifically selected and tested for high-performance OTL amplifiers and high-reliability audio systems.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThanks to their high current capability and remarkable operational stability, these tubes are a particularly attractive choice for OTL headphone amplifier enthusiasts and for audio systems using the 6AS7 \/ 6080 family.\u003c\/p\u003e\n\u003cp\u003eThis \u003cstrong\u003emilitary production General Electric 6AS7GA\u003c\/strong\u003e represents a \u003cstrong\u003econscious, technical, and durable\u003c\/strong\u003e choice, significantly superior to modern production in terms of \u003cstrong\u003ebuild quality, electrical stability, and sonic coherence\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThese are \u003cstrong\u003eauthentic NOS\u003c\/strong\u003e, never used, sourced from \u003cstrong\u003eDLA (Defense Logistics Agency) military stock\u003c\/strong\u003e, manufactured in the USA in \u003cstrong\u003e1986\u003c\/strong\u003e at the \u003cstrong\u003eGE Owensboro, Kentucky plant\u003c\/strong\u003e: one of the \u003cstrong\u003elast truly specialized American sites\u003c\/strong\u003e for the production of \u003cstrong\u003ehigh-current\u003c\/strong\u003e power tubes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOS Military Stock – direct replacement for 6080\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003e🎧 \u003cstrong\u003eCompatibility with OTL Amplifiers\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThese GE 6AS7GA tubes belong to the 6AS7 \/ 6080 family and can be used in numerous OTL amplifiers designed for such tubes or compatible equivalents, including various Feliks Audio, DarkVoice, La Figaro, Woo Audio, Atma-Sphere models, and other dedicated OTL projects.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFinal compatibility always depends on the specific design of the device and the manufacturer's recommendations. If in doubt, we recommend checking the amplifier's manual before purchasing.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWhy choose this GE 6AS7GA\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e✔ \u003cstrong\u003eAmerican military production\u003c\/strong\u003e, not civilian\u003cbr\u003e✔ \u003cstrong\u003eBlack plates\u003c\/strong\u003e and oversized internal structure\u003cbr\u003e✔ \u003cstrong\u003eReal selection and matching\u003c\/strong\u003e, designed for OTL use\u003cbr\u003e✔ \u003cstrong\u003eSuperior current stability\u003c\/strong\u003e compared to common 6080s and modern productions\u003cbr\u003e✔ \u003cstrong\u003eProfessional Amplitrex AT-1000 test\u003c\/strong\u003e, not generic instruments\u003c\/p\u003e\n\u003cp\u003eThis is \u003cstrong\u003enot a \"6080 alternative\"\u003c\/strong\u003e, but a \u003cstrong\u003efully mature 6AS7GA\u003c\/strong\u003e, designed to operate \u003cstrong\u003efor a long time, safely, and with predictable electrical behavior\u003c\/strong\u003e in serious OTL circuits.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTonal characteristics and sonic description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBass\u003c\/strong\u003e\u003cbr\u003eAuthoritative and well-founded. The bass range is deep, full-bodied, and perfectly controlled, capable of imparting weight and realism without compromising precision and speed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMidrange\u003c\/strong\u003e\u003cbr\u003eSoft, natural, and three-dimensional. Vocals emerge with warmth and naturalness; acoustic instruments and piano sound present and credible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTreble\u003c\/strong\u003e\u003cbr\u003eClean, sweet, and never aggressive. The extension is wide and smooth, with a refined brilliance that adds air and transparency without fatigue.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamics\u003c\/strong\u003e\u003cbr\u003eFluid, coherent, and free of rigidity. Micro and macro dynamics are reproduced naturally, without compression or hardening.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSoundstage\u003c\/strong\u003e\u003cbr\u003eWide, stable, and deep, with precise focus and a perfectly balanced soundstage thanks to accurate matching.\u003c\/p\u003e\n\u003ch3\u003e🎧 \u003cstrong\u003eUse in OTL Hi-Fi Amplifiers\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\u003cp\u003eIdeal for mid-to-high-end and high-end \u003cstrong\u003eOTL (Output Transformerless)\u003c\/strong\u003e amplifiers such as \u003cstrong\u003eAtma-Sphere\u003c\/strong\u003e, \u003cstrong\u003eFeliks Audio\u003c\/strong\u003e, \u003cstrong\u003eDarkVoice\u003c\/strong\u003e, as well as for serious custom projects, where the following are required:\u003c\/p\u003e\n\u003cp\u003e• high current capability\u003cbr\u003e• long-term stability\u003cbr\u003e• predictable electrical behavior\u003c\/p\u003e\n\u003cp\u003eAlso excellent as \u003cstrong\u003eregulator tubes\u003c\/strong\u003e or \u003cstrong\u003epower buffers\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003e🎸 \u003cstrong\u003eUse in Musical Amplifiers\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\u003cp\u003eAlso appreciated in professional settings for \u003cstrong\u003elow noise\u003c\/strong\u003e and \u003cstrong\u003econtrolled harmonic rendition\u003c\/strong\u003e, the GE 6AS7GA offers a \u003cstrong\u003ewarm, solid, and stable\u003c\/strong\u003e tone, suitable for studio preamplifiers and vintage tube compressors.\u003c\/p\u003e\n\u003ch3\u003e🎯 \u003cstrong\u003eNote for audiophiles and collectors\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\u003cp\u003e• \u003cstrong\u003eGE – Owensboro, Kentucky\u003c\/strong\u003e production\u003cbr\u003e• \u003cstrong\u003e1986\u003c\/strong\u003e – last period of true quality American military production\u003cbr\u003e• \u003cstrong\u003eNOS NIB\u003c\/strong\u003e – New Old Stock, New In Box\u003cbr\u003e• \u003cstrong\u003eMilitary green GE silkscreen\u003c\/strong\u003e\u003cbr\u003e• \u003cstrong\u003eDomed chrome getter\u003c\/strong\u003e\u003cbr\u003e• \u003cstrong\u003eNever used\u003c\/strong\u003e tubes, perfectly preserved\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturing code:\u003c\/strong\u003e 86-48 (48th week of 1986 – RMA\/EIA Open Date Code)\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eA \u003cstrong\u003ereliable, stable, and musically mature selection\u003c\/strong\u003e, designed for those who use serious \u003cstrong\u003eOTL amplifiers\u003c\/strong\u003e and desire an authentic \u003cstrong\u003e6AS7GA quartet\u003c\/strong\u003e, capable of ensuring uniform operation, long life, and consistent performance over time without compromises with modern production.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eProfessional testing and selection\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll tubes are \u003cstrong\u003etested and matched by us\u003c\/strong\u003e on \u003cstrong\u003eAmplitrex AT-1000\u003c\/strong\u003e, with a \u003cstrong\u003edouble control procedure\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cp\u003e• \u003cstrong\u003ePre-selection at fixed bias\u003c\/strong\u003e to check linearity, symmetry, and absence of defects\u003cbr\u003e• \u003cstrong\u003eTest in Auto Bias\u003c\/strong\u003e to simulate real operating conditions in OTL circuits\u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003eVERY STRONG\u003c\/strong\u003e emission\u003cbr\u003e✔ Well-balanced internal sections\u003cbr\u003e✔ Matched quad with consistent behavior among all tubes\u003cbr\u003e✔ No shorts, gas, or instability\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest results (for technicians and professionals)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTube #16\u003c\/strong\u003e\u003cbr\u003eSection 1 → Gm = 3250 ; Ia = 55 mA ; Vg = -115 V\u003cbr\u003eSection 2 → Gm = 3470 ; Ia = 55 mA ; Vg = -111 V\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube #17\u003c\/strong\u003e\u003cbr\u003eSection 1 → Gm = 3450 ; Ia = 55 mA ; Vg = -110 V\u003cbr\u003eSection 2 → Gm = 3320 ; Ia = 55 mA ; Vg = -113 V\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube #20\u003c\/strong\u003e\u003cbr\u003eSection 1 → Gm = 3160 ; Ia = 55 mA ; Vg = -117 V\u003cbr\u003eSection 2 → Gm = 3640 ; Ia = 55 mA ; Vg = -110 V\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube #3\u003c\/strong\u003e\u003cbr\u003eSection 1 → Gm = 3180 ; Ia = 55 mA ; Vg = -112 V\u003cbr\u003eSection 2 → Gm = 3500 ; Ia = 55 mA ; Vg = -113 V\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional tests\u003c\/strong\u003e\u003cbr\u003e• Microphonics: standard, suitable for hi-fi and musical use\u003cbr\u003e• Emission: excellent, stable, without fluctuations\u003cbr\u003e• Shorts and gas: absent\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOTL Set (8–12 tubes) → upon request \/ dedicated selection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Perché le nostre valvole sono diverse – il protocollo VTT che migliora suono, affidabilità e durata\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"GE","offers":[{"title":"Default Title","offer_id":56145394237788,"sku":"03298Q","price":239.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/3_bca0378d-2981-4ce5-9c14-ca06e505b874.jpg?v=1764867493","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/6as7ga-6080-ge-nos-nib-black-plate-green-print-matched-pair-amplitrex-tested-copia","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}