{"product_id":"12au7-ecc82-nos-amperex-matched-pair-orange-globe-heerlen-1960-short-gray-plates-balanced-amplitrex-tested-same-data-codes","title":"12AU7 \/ ECC82 NOS AMPEREX Matched Pair - Orange Globe Heerlen 1960 - Short Gray Plates - Balanced - Amplitrex Tested","description":"\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003e12AU7 \/ ECC82 NOS AMPEREX Matched Pair - Orange Globe Heerlen 1960 - Short Gray Plates - Halo Getter - Balanced - MADE IN HOLLAND \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eAmplitrex Tested\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003eGeneral Description:\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis \u003cspan class=\"s1\"\u003e\u003cb\u003epair of 12AU7 \/ ECC82 Amperex Orange Globe tubes\u003c\/b\u003e\u003c\/span\u003e, produced in the historic \u003cspan class=\"s1\"\u003e\u003cb\u003eHeerlen (Holland) factory in the 1960s\u003c\/b\u003e\u003c\/span\u003e, represents one of the most recognizable and appreciated expressions of the European school.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe combination of the \u003cspan class=\"s1\"\u003e\u003cb\u003eAmperex brand\u003c\/b\u003e\u003c\/span\u003e, Heerlen construction, and iconic \u003cspan class=\"s1\"\u003e\u003cb\u003eOrange Globe\u003c\/b\u003e\u003c\/span\u003e graphics gives these tubes a precise identity: tonal refinement, balance, and natural musicality.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe pair is offered in a \u003cspan class=\"s1\"\u003e\u003cb\u003ematched pair\u003c\/b\u003e\u003c\/span\u003e configuration, an element of great value for constructive coherence and operational uniformity.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eKey construction features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eShort Gray Plates\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eHalo Getter\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eproduction \u003c\/span\u003e\u003cb\u003eHeerlen – Made in Holland\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e1960s\u003c\/li\u003e\n\u003cli class=\"p1\"\u003ehigh-level European build quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eTested with \u003cspan class=\"s1\"\u003e\u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\u003c\/span\u003e, they obtained:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eInternal VTT Classification: VERY STRONG\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eVery strong and stable emission\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eAbsence of shorts and GAS\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eExcellent balance between sections\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eA pair that stands out for consistency, reliability, and sound quality, perfectly in line with the expectations of Amperex Heerlen enthusiasts.\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003eSound Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eBass\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eControlled and elegant, with a balanced presence that favors precision and articulation over emphasis.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMids\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe real strength: natural, fluid, and rich in nuances. Vocals emerge with realism and coherence, without artifice.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHighs\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eOpen and refined, never aggressive. They offer detail and air while always maintaining a soft texture.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDynamics\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eBalanced and progressive, with a response that favors musicality and naturalness rather than forced impact.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSoundstage\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eWell organized, with a credible scene and good instrument separation.\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cb\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis pair is perfectly suited for high-level hi-fi systems, where one seeks:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003etonal balance\u003c\/li\u003e\n\u003cli class=\"p1\"\u003etimbral naturalness\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eabsence of listening fatigue\u003c\/li\u003e\n\u003cli class=\"p1\"\u003ecoherence between registers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eParticularly suitable for preamplifiers and driver stages where the quality of the 12AU7 significantly impacts the final result.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e🎸 Use in Musical Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eIn musical applications, these Amperex offer:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003efluid and controlled response\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eexcellent dynamic management\u003c\/li\u003e\n\u003cli class=\"p1\"\u003emusical and never aggressive sound character\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eIdeal for those seeking definition and musicality without rigidity.\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003e🎯 Note for audiophiles and technicians\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eAmperex Orange Globe – Heerlen (Holland)\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003e1960s – benchmark European production\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eMatched Pair\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eShort Gray Plates – Halo Getter\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eAmplitrex Test – VERY STRONG\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eStable Emission – No GAS or shorts\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eExcellent balance between sections\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eA pair that fully embodies the \u003cspan class=\"s1\"\u003e\u003cb\u003eAmperex Heerlen 1960s\u003c\/b\u003e\u003c\/span\u003e character:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p2\"\u003e\u003cb\u003erefined, musical, and credible\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p2\"\u003e\u003cb\u003ecarefully selected and verified\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p2\"\u003e\u003cb\u003ecapable of tangibly enhancing listening quality\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eTube tested on AMPLITREX AT-1000 Tube Tester:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e Va = 250V, Vg = -8.5V\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e Gm = 2200 ; Ia = 10.5 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eTube 1:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2100 ; Ia = 10.8 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2200 ; Ia = 10.4 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eTube 2:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2150 ; Ia = 10.8 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2200 ; Ia = 11.2 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Excellent – Very strong and stable emission, without fluctuations.\u003cbr\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eShorts and GAS:\u003c\/strong\u003e Absent.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e NOS - New Old Stock - Tested and functional - Supplied in our custom box for optimal protection.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Perfectly operational.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e Very Good – Legible lettering with slight signs of age, no apparent defects. See photos for details.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturing Code:\u0026nbsp;\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e\u003c\/strong\u003eGf8 Δ0A4\u0026nbsp;- \u003cmeta charset=\"utf-8\"\u003eGfx indicates an ECC82 with the sequential progression of x, where the increment of x indicates production changes - \u003cmeta charset=\"utf-8\"\u003eΔ0A4 Δ → Heerlen (Holland), 0 (out of four digits) → 1960 - A → January - 4 → 4th week of the month\u003c\/li\u003e\n\u003cli\u003e\u003cmeta charset=\"utf-8\"\u003eGf8 Δ0A3\u0026nbsp;- \u003cmeta charset=\"utf-8\"\u003eGfx indicates an ECC82 with the sequential progression of x, where the increment of x indicates production changes - \u003cmeta charset=\"utf-8\"\u003eΔ0A3 Δ → Heerlen (Holland), 0 (out of four digits) → 1960 - A → January - 3 → 3rd week of the month\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cmeta charset=\"utf-8\"\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":"AMPEREX","offers":[{"title":"Default Title","offer_id":57421185220956,"sku":"03548","price":1664.0,"currency_code":"HKD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/2_9fa6244b-713b-4a7f-bbac-e80c9b363d15.jpg?v=1776866561","url":"https:\/\/vacuumtubestreasures.com\/en-hk\/products\/12au7-ecc82-nos-amperex-matched-pair-orange-globe-heerlen-1960-short-gray-plates-balanced-amplitrex-tested-same-data-codes","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}