{"product_id":"12ax7-ecc83-nos-baldwin-by-sylvania-long-gray-plates-large-halo-getter-matched-tubes-made-in-usa-52","title":"12AX7 ECC83 NOS Baldwin by Sylvania – Long Gray Plates Large Halo Getter Matched Quad Tubes USA 1952","description":"\u003cp\u003e \u003cstrong\u003e12AX7 ( ECC83 ) NOS Baldwin by SYLVANIA Long Gray Plates Large Halo Getter Matched Tubes MADE IN USA '52\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-start=\"214\" data-end=\"703\" class=\"\"\u003e The \u003cstrong data-start=\"217\" data-end=\"246\"\u003e12AX7 Baldwin by Sylvania\u003c\/strong\u003e , manufactured in the \u003cstrong data-start=\"263\" data-end=\"287\"\u003eUSA in 1952\u003c\/strong\u003e , is a matched Baldwin organ valve built by Sylvania with \u003cstrong data-start=\"362\" data-end=\"387\"\u003elong gray plates\u003c\/strong\u003e and \u003cstrong data-start=\"390\" data-end=\"429\"\u003elarge-diameter ring getters\u003c\/strong\u003e , to exacting selection standards. This \u003cstrong data-start=\"478\" data-end=\"499\"\u003ematched quartet\u003c\/strong\u003e represents a rare combination of \u003cstrong data-start=\"537\" data-end=\"604\"\u003enatural musicality, quiet operation, and tonal consistency\u003c\/strong\u003e , ideal for symmetrical stereo applications or high-precision multiple-channel configurations.\u003c\/p\u003e\n\n \u003cp data-start=\"705\" data-end=\"900\" class=\"\"\u003e\u003cstrong data-start=\"705\" data-end=\"714\"\u003eBass\u003c\/strong\u003e : Smooth and well-controlled, with a balanced presence free of bloat. They provide a solid and coherent foundation for the soundstage, with excellent articulation in the lower registers.\u003c\/p\u003e\n\n\u003cp data-start=\"902\" data-end=\"1101\" class=\"\"\u003e \u003cstrong data-start=\"902\" data-end=\"910\"\u003eMids\u003c\/strong\u003e : Warm, slightly euphonic, and rich in harmonics. Vocals and acoustic instruments emerge naturally and deeply, always maintaining a consistent timbre across the tubes in the group.\u003c\/p\u003e\n\n\u003cp data-start=\"1103\" data-end=\"1267\" class=\"\"\u003e \u003cstrong data-start=\"1103\" data-end=\"1111\"\u003eHighs\u003c\/strong\u003e : Airy and velvety, free from harshness. Even on highly analytical systems, the high range retains brilliance and musicality without tiring the listener.\u003c\/p\u003e\n\n\u003cp data-start=\"1269\" data-end=\"1465\" class=\"\"\u003e \u003cstrong data-start=\"1269\" data-end=\"1281\"\u003eDynamics\u003c\/strong\u003e : Smooth, musical, and well-balanced. The quartet delivers a cohesive and natural response, with well-managed microtransients and a linear, reliable behavior from each tube.\u003c\/p\u003e\n\n \u003cp data-start=\"1467\" data-end=\"1679\" class=\"\"\u003e\u003cstrong data-start=\"1467\" data-end=\"1481\"\u003eSoundstage\u003c\/strong\u003e : Wide, three-dimensional, and stable. Thanks to accurate matching, the soundstage is deeply coherent, with excellent separation between the sound planes and a sense of well-distributed space.\u003c\/p\u003e\n\n\u003cp data-start=\"1681\" data-end=\"2051\" class=\"\"\u003e This \u003cstrong data-start=\"1688\" data-end=\"1748\"\u003ematched quartet of Sylvania 12AX7s made for Baldwin\u003c\/strong\u003e is an excellent choice for those seeking a \u003cstrong data-start=\"1791\" data-end=\"1848\"\u003erefined, musical, and smooth tonal presentation\u003c\/strong\u003e , ideal for \u003cstrong data-start=\"1861\" data-end=\"1979\"\u003emulti-channel preamplifiers, dual-mono stereo amplifiers, balanced DACs, or high-end hi-fi systems\u003c\/strong\u003e where \u003cstrong data-start=\"1988\" data-end=\"2030\"\u003esymmetry and precision between channels\u003c\/strong\u003e make the difference.\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"691\" data-start=\"215\"\u003e 🎸 \u003cstrong data-end=\"263\" data-start=\"218\"\u003eUse in Guitar and Bass Amplifiers\u003c\/strong\u003e\u003cbr data-end=\"266\" data-start=\"263\"\u003e\u003c\/p\u003e\n\n \u003cp data-start=\"247\" data-end=\"756\" class=\"\"\u003eThis \u003cstrong data-start=\"305\" data-end=\"379\"\u003ematched quartet of Baldwin by Sylvania 12AX7 long-plate gray tubes\u003c\/strong\u003e , selected for professional use, is particularly suited to \u003cstrong data-start=\"443\" data-end=\"502\"\u003estereo heads, amplifiers with multiple gain stages\u003c\/strong\u003e , or \u003cstrong data-start=\"513\" data-end=\"532\"\u003emulti-channel preamps\u003c\/strong\u003e where \u003cstrong data-start=\"543\" data-end=\"582\"\u003etonal consistency between tubes\u003c\/strong\u003e is crucial. Their smooth, harmonic, and coherent response allows for a \u003cstrong data-start=\"673\" data-end=\"708\"\u003emusical, articulate, and natural\u003c\/strong\u003e sound, even in complex or studio setups.\u003c\/p\u003e\n\n\u003cp data-start=\"758\" data-end=\"1072\" class=\"\"\u003e 🔊 \u003cstrong data-start=\"761\" data-end=\"798\"\u003eIdeal for musicians looking for:\u003c\/strong\u003e\u003cbr data-start=\"798\" data-end=\"801\"\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"758\" data-end=\"1072\"\u003e Timbral uniformity and consistent response across all channels\u003cbr data-start=\"860\" data-end=\"863\"\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"758\" data-end=\"1072\"\u003e Clean three-dimensional, warm and well separated\u003cbr data-start=\"909\" data-end=\"912\"\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"758\" data-end=\"1072\"\u003e A smooth and harmonic overdrive, ideal for jazz, blues and vintage rock\u003cbr data-start=\"983\" data-end=\"986\"\u003e\n\n\u003c\/li\u003e\n\n \u003cli data-start=\"758\" data-end=\"1072\"\u003eLow microphonics, perfect even in studio racks or professional live systems\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"1074\" data-end=\"1585\" class=\"\"\u003e \u003cstrong data-start=\"1074\" data-end=\"1122\"\u003eExamples of applications where they perform at their best:\u003c\/strong\u003e\u003cbr data-start=\"1122\" data-end=\"1125\"\u003e 🎸 \u003cstrong data-start=\"1128\" data-end=\"1227\"\u003eBoutique stereo heads (Two Rock Studio Signature, Matchless HC-30, Mesa Boogie Studio Preamp)\u003c\/strong\u003e – Ensures tonal symmetry between channels and great musicality\u003cbr data-start=\"1292\" data-end=\"1295\"\u003e 🎸 \u003cstrong data-start=\"1298\" data-end=\"1390\"\u003eVintage amps with more preamp tubes (Fender Bassman 6G6, Marshall Super Lead, Ampeg V4)\u003c\/strong\u003e – Makes the sound more consistent and refined throughout the entire chain\u003cbr data-start=\"1454\" data-end=\"1457\"\u003e 🎸 \u003cstrong data-start=\"1460\" data-end=\"1509\" data-is-only-node=\"\"\u003eMulti-channel preamps for studio or live performance\u003c\/strong\u003e – Ideal for ensuring consistent tonal quality and low noise in each channel\u003c\/p\u003e\n\n\u003cp data-start=\"1587\" data-end=\"2048\" class=\"\"\u003e 🎯 \u003cstrong data-start=\"1590\" data-end=\"1635\"\u003eNote to musicians and studio engineers:\u003c\/strong\u003e \u003cbr data-start=\"1635\" data-end=\"1638\"\u003eThis matched quartet represents a \u003cstrong data-start=\"1679\" data-end=\"1769\"\u003eprofessional solution for those seeking coherence and musicality throughout the circuit\u003c\/strong\u003e . It is not suitable for those who want a pushed, saturated, or aggressive sound: in that case, more aggressive tubes like modern Tung-Sols may be preferred. But for those who love the \u003cstrong data-start=\"1936\" data-end=\"2001\"\u003evintage feel, natural detail, and harmonic depth\u003c\/strong\u003e , it is one of the most refined choices available.\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 Valve tested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTest Conditions:\u003c\/strong\u003e \u003cspan\u003eVa = 250V ; Vg = -2V\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eAverage 100%:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1600 ; Ia = 1.2 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTest Result:\u003c\/strong\u003e 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\u003cspan\u003e \u003c\/span\u003eGm = 1500 ; Ia = 0.9 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 1.0 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\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1300 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 0.9 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\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1500 ; Ia = 0.9 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\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cdiv\u003e \u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e Standard. Tested and approved for use in hi-fi and guitar amplifiers.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – ​​Very strong and stable output, no fluctuations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\n\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 New Old Stock - Tested and working - In our custom box.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eAesthetic condition:\u003c\/strong\u003e Adequate – Some writing is faded or illegible, overall appearance shows obvious signs of aging. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 312 226 - 26th week of 1952\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":54238663115100,"sku":"02860","price":152.83,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_c0648c27-80fd-43b6-8654-9bd1f7db2244.jpg?v=1743407876","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/12ax7-ecc83-nos-baldwin-by-sylvania-long-gray-plates-large-halo-getter-matched-tubes-made-in-usa-52","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}