{"product_id":"12au7-ecc82-nos-baldwin-by-sylvania-long-gray-plates-square-getter-matched-quad-tubes-made-in-usa-49","title":"12AU7 ECC82 NOS Baldwin Sylvania Matched Quad Long Gray Plates Tubes USA 1954","description":"\u003cp\u003e\u003cstrong\u003e12AU7 A ( ECC82 ) NOS Baldwin by SYLVANIA Long Gray Plates Halo Getter Matched Quad Same Data Codes Tubes Made in USA '54\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"1010\" data-start=\"459\"\u003e The \u003cstrong data-end=\"492\" data-start=\"462\"\u003e12AU7A Baldwin by SYLVANIA\u003c\/strong\u003e , made in \u003cstrong data-end=\"535\" data-start=\"509\"\u003e1954 in the USA\u003c\/strong\u003e for select use in \u003cstrong data-end=\"582\" data-start=\"564\"\u003eBaldwin organs\u003c\/strong\u003e , is a high-end valve, built to exacting standards and selected for \u003cstrong data-end=\"721\" data-start=\"674\"\u003estability, musicality and tonal accuracy\u003c\/strong\u003e . \u003cbr data-end=\"725\" data-start=\"722\"\u003eIn this version with \u003cstrong data-end=\"773\" data-start=\"748\"\u003elong grey plates\u003c\/strong\u003e , \u003cstrong data-end=\"790\" data-start=\"775\"\u003ehalo getters\u003c\/strong\u003e and \u003cstrong data-end=\"826\" data-start=\"793\"\u003eidentical production codes\u003c\/strong\u003e , the \u003cstrong data-end=\"852\" data-start=\"831\"\u003ematched quartet\u003c\/strong\u003e stands out for a \u003cstrong data-end=\"916\" data-start=\"879\"\u003eround, fluid and three-dimensional\u003c\/strong\u003e sound, ideal for tube preamps, tube DACs, stereo driver stages and OTL amplifiers.\u003c\/p\u003e\n\n\u003cp data-end=\"1261\" data-start=\"1012\"\u003e \u003cstrong data-end=\"1021\" data-start=\"1012\"\u003eBass\u003c\/strong\u003e : dry, deep, and well-articulated. The low register is tight and stable, with an immediate response that gives solidity to the musical message without introducing bloat. The grain is fine, with a clean rendition even in complex passages.\u003c\/p\u003e\n\n \u003cp data-end=\"1491\" data-start=\"1263\"\u003e\u003cstrong data-end=\"1271\" data-start=\"1263\"\u003eMids\u003c\/strong\u003e : Full, warm, and coherent. Voices emerge naturally, maintaining a rounded, never fatiguing timbre. Acoustic instruments are rendered with great realism, thanks to a fluid, well-centered harmonic texture.\u003c\/p\u003e\n\n\u003cp data-end=\"1720\" data-start=\"1493\"\u003e \u003cstrong data-end=\"1501\" data-start=\"1493\"\u003eHighs\u003c\/strong\u003e : Airy, bright, and velvety. The highs are open yet controlled, with elegant detail that enriches the soundstage without ever becoming harsh. The clarity is refined, suitable even for prolonged listening.\u003c\/p\u003e\n\n\u003cp data-end=\"1971\" data-start=\"1722\"\u003e \u003cstrong data-end=\"1734\" data-start=\"1722\"\u003eDynamics\u003c\/strong\u003e : progressive, balanced, and responsive. The transient response is fluid and musical, with highly detailed micro-variations. The \u003cstrong data-end=\"1910\" data-start=\"1892\"\u003elong-plate\u003c\/strong\u003e structure promotes natural reproduction even in the most delicate passages.\u003c\/p\u003e\n\n \u003cp data-end=\"2235\" data-start=\"1973\"\u003e\u003cstrong data-end=\"1987\" data-start=\"1973\"\u003eSoundstage\u003c\/strong\u003e : wide, three-dimensional, and coherent. The soundstage unfolds with great realism, thanks to the stability and symmetry provided by the \u003cstrong data-end=\"2158\" data-start=\"2117\"\u003ematched quartet with identical codes\u003c\/strong\u003e . The stereo image is focused, with well-balanced depth and width.\u003c\/p\u003e\n\n\u003cp data-end=\"2504\" data-start=\"2237\"\u003e The \u003cstrong data-end=\"2336\" data-start=\"2240\"\u003e12AU7A Baldwin by SYLVANIA – Long Gray Plates – Halo Getter – Matched Quad – Made in USA '54\u003c\/strong\u003e , is a tube with a musical soul, perfect for those looking for \u003cstrong data-end=\"2457\" data-start=\"2396\"\u003etransparency, tonal balance and natural harmonic output\u003c\/strong\u003e , without compromising between detail and musicality.\u003c\/p\u003e\n\n\u003cp data-end=\"2566\" data-start=\"2506\"\u003e 🎧 \u003cstrong data-end=\"2566\" data-start=\"2509\"\u003eUse in Headphone Amplifiers and Hi-Fi Driver Stages\u003c\/strong\u003e\u003c\/p\u003e\n\n \u003cp data-end=\"2976\" data-start=\"2568\"\u003eExcellent in OTL amplifiers, tube preamps or tube DACs, this tube delivers a \u003cstrong data-end=\"2710\" data-start=\"2674\"\u003ecoherent, refined and balanced\u003c\/strong\u003e voice, ideal for use with reference headphones such as \u003cstrong data-end=\"2780\" data-start=\"2759\"\u003ethe Sennheiser HD800S\u003c\/strong\u003e , \u003cstrong data-end=\"2797\" data-start=\"2782\"\u003eFocal Clear\u003c\/strong\u003e , \u003cstrong data-end=\"2815\" data-start=\"2799\"\u003eAudeze LCD-X\u003c\/strong\u003e or \u003cstrong data-end=\"2832\" data-start=\"2818\"\u003eZMF Atrium\u003c\/strong\u003e . Coherence between channels is enhanced by the selection of \u003cstrong data-end=\"2912\" data-start=\"2893\"\u003eidentical codes\u003c\/strong\u003e , making it perfect for balanced or dual mono configurations.\u003c\/p\u003e\n\n\u003cp data-end=\"3026\" data-start=\"2978\"\u003e 🎸 \u003cstrong data-end=\"3026\" data-start=\"2981\"\u003eUse in Guitar and Bass Amplifiers\u003c\/strong\u003e\u003c\/p\u003e\n\n \u003cp data-end=\"3362\" data-start=\"3028\"\u003eThis tube also lends itself well to musical use in \u003cstrong data-end=\"3130\" data-start=\"3084\"\u003evintage or boutique tube amplifiers\u003c\/strong\u003e , particularly as a \u003cstrong data-end=\"3168\" data-start=\"3152\"\u003estage driver\u003c\/strong\u003e or \u003cstrong data-end=\"3194\" data-start=\"3171\"\u003ephase inverter\u003c\/strong\u003e . The tone is \u003cstrong data-end=\"3232\" data-start=\"3208\"\u003erich yet controlled\u003c\/strong\u003e , with a gradual dynamic response and natural harmonic saturation, suitable for refined sounds and recording environments.\u003c\/p\u003e\n\n\u003cp data-end=\"3756\" data-start=\"3364\"\u003e 🎯 \u003cstrong data-end=\"3393\" data-start=\"3367\"\u003eNote for audiophiles\u003c\/strong\u003e \u003cbr data-end=\"3396\" data-start=\"3393\"\u003eA tube that combines \u003cstrong data-end=\"3491\" data-start=\"3419\"\u003econstruction refinement, natural musicality, and tonal transparency\u003c\/strong\u003e , perfect for systems where detail must coexist with smoothness, and operational symmetry is a fundamental requirement. The \u003cstrong data-end=\"3678\" data-start=\"3624\"\u003ematched quartet with halo getters and long plates\u003c\/strong\u003e is one of the most sought-after configurations of American production from the 1950s.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eTest Results:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve tested on AMPLITREX AT-1000 Tube Tester:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTest Conditions:\u003c\/strong\u003e Va = 250V, Vg = -8.5V\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eAverage 100%:\u003c\/strong\u003e Gm = 2200 ; Ia = 10.5 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 1:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300 ; Ia = 10.4 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2400 ; Ia = 10.8 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 2:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2400 ; Ia = 10.6 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2300 ; Ia = 10.4 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 3:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2400 ; Ia = 10.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2300 ; Ia = 10.6 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 4:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2350 ; Ia = 10.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2300 ; Ia = 10.6 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low – Tested and rated for use in hi-fi systems and guitar amplifiers.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – ​​Very strong and stable output, no fluctuations.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eConditions:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCondition:\u003c\/strong\u003e NOS - New Old Stock - Tested and in perfect working order. Comes in our custom box for optimal protection.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e Excellent – ​​Excellently preserved lettering, minimal signs of wear. See photos for details.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 312 439 - produced in the 39th week of 1954\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\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":"SYLVANIA","offers":[{"title":"Default Title","offer_id":54609013604700,"sku":"02942","price":7800.0,"currency_code":"ALL","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_95add677-6088-4635-a2df-a4bc150385b1.jpg?v=1748269636","url":"https:\/\/vacuumtubestreasures.com\/en-al\/products\/12au7-ecc82-nos-baldwin-by-sylvania-long-gray-plates-square-getter-matched-quad-tubes-made-in-usa-49","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}