{"product_id":"5881-6l6wgb-ge-brown-base-side-oo-getter-matched-tubes-made-in-canada","title":"6L6WGB \/ 5881 GE Matched Quad Brown Base Side OO Getter Tubes Made in CANADA @ TEST NOS","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e6L6WGB \/ 5881 GE Matched Quad Brown Base Side OO Getter Tubes Made in CANADA @ TEST NOS\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"1070\" data-start=\"479\"\u003eThis matched quartet of GE-branded 5881s, produced in Canadian factories in the late 1950s, represents one of the most respected versions of the 6L6WGB. Construction includes \u003cstrong data-end=\"719\" data-start=\"694\"\u003eblack solid plates\u003c\/strong\u003e , \u003cstrong data-end=\"762\" data-start=\"721\"\u003edual 'OO'-shaped side getters\u003c\/strong\u003e , and \u003cstrong data-end=\"795\" data-start=\"766\"\u003ea brown Bakelite base\u003c\/strong\u003e , a hallmark of high-quality military and OEM supplies.\u003cbr data-end=\"864\" data-start=\"861\"\u003eThe tubes are \u003cstrong data-end=\"918\" data-start=\"880\"\u003eused but tested with NOS values\u003c\/strong\u003e , and are perfectly matched to each other for anode current and transconductance, ensuring sonic consistency and technical reliability in every application.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTimbre\u0026nbsp;characteristics:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"1354\" data-start=\"1132\"\u003e\u003cstrong data-end=\"1142\" data-start=\"1132\"\u003eBass:\u003c\/strong\u003e\u003cbr data-end=\"1145\" data-start=\"1142\"\u003eTight, controlled, and precise. The low end of the 5881 GE is less explosive than that of modern 6L6GCs, but gains in articulation and definition. Perfect for detailed listening or fast, dry bass.\u003c\/p\u003e\n\u003cp data-end=\"1567\" data-start=\"1356\"\u003e\u003cstrong data-end=\"1365\" data-start=\"1356\"\u003eMedium:\u003c\/strong\u003e\u003cbr data-end=\"1368\" data-start=\"1365\"\u003eBalanced, dynamic, and natural. The mids emerge with fluidity and great coherence, offering a neutral yet never sterile timbre. Vocals are rendered realistically and pleasantly, without artificial coloration.\u003c\/p\u003e\n\u003cp data-end=\"1752\" data-start=\"1569\"\u003e\u003cstrong data-end=\"1578\" data-start=\"1569\"\u003eHighs:\u003c\/strong\u003e\u003cbr data-end=\"1581\" data-start=\"1578\"\u003eDelicate and well-extended. The highs are silky, well-integrated, and never invasive. Detail is present but not aggressive, with a fine grain that favors prolonged listening.\u003c\/p\u003e\n\u003cp data-end=\"1926\" data-start=\"1754\"\u003e\u003cstrong data-end=\"1767\" data-start=\"1754\"\u003eDynamics:\u003c\/strong\u003e\u003cbr data-end=\"1770\" data-start=\"1767\"\u003eResponsive and fluid, with excellent microdynamics. Transient response is natural and precise, making the 5881 ideal for those seeking expressiveness without excess.\u003c\/p\u003e\n\u003cp data-end=\"2142\" data-start=\"1928\"\u003e\u003cstrong data-end=\"1943\" data-start=\"1928\"\u003eSoundstage:\u003c\/strong\u003e\u003cbr data-end=\"1946\" data-start=\"1943\"\u003eCoherent and three-dimensional. The soundstage opens up with order and depth, offering good separation between instruments and vocals. Excellent positioning of sound sources and well-managed spatiality.\u003c\/p\u003e\n\u003ch3 data-end=\"2201\" data-start=\"2149\"\u003e🎧 Use in Push-Pull Stereo Hi-Fi Amplifiers\u003c\/h3\u003e\n\u003cp data-end=\"2603\" data-start=\"2202\"\u003eIdeal for stereo or integrated amplifiers based on push-pull topologies, these GE 5881s are perfect for vintage or modern projects. They offer \u003cstrong data-end=\"2416\" data-start=\"2382\"\u003ea balanced and musical sound\u003c\/strong\u003e , with low noise, excellent control and a classic yet refined sonic signature. Particularly suitable for medium-high efficiency systems or for those who prefer a transparent yet warm sound.\u003c\/p\u003e\n\u003ch3 data-end=\"2660\" data-start=\"2610\"\u003e🎸 Use in Guitar and Bass Amplifiers\u003c\/h3\u003e\n\u003cp data-end=\"3019\" data-start=\"2661\"\u003eThe 5881 GE Canada is a popular choice in Fender blackface and brownface circuits (such as the Bassman, Bandmaster, Pro). They offer \u003cstrong data-end=\"2825\" data-start=\"2784\"\u003eprogressive harmonic compression\u003c\/strong\u003e , \u003cstrong data-end=\"2857\" data-start=\"2827\"\u003eclean, dynamic headroom\u003c\/strong\u003e , and \u003cstrong data-end=\"2892\" data-start=\"2865\"\u003econtrolled saturation\u003c\/strong\u003e , ideal for jazz, blues, and “American” cleans. They are also excellent for boutique projects seeking a reliable, vintage voice.\u003c\/p\u003e\n\u003ch3 data-end=\"3063\" data-start=\"3026\"\u003e🎯 Note for audiophiles and technicians\u003c\/h3\u003e\n\u003cp data-end=\"3380\" data-start=\"3064\"\u003eThe 5881 GE Canada offers \u003cstrong data-end=\"3134\" data-start=\"3090\"\u003eone of the most balanced and honest sounds\u003c\/strong\u003e of the 6L6 family: musicality, stability, and a natural voice that never tires. The sturdy construction and stable electrical characteristics make this matched quartet ideal for restorations, upgrades, and everyday use in demanding systems.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTested on\u003cmeta charset=\"utf-8\"\u003e AVO VCM 163 Tube tester:\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003eVf = 6.3V; Va = 300V; Vg2 = 200V; Vg = -12.5V\u003cbr\u003eAverage 100% Gm = 5300 ; Ia = 48 mA\u003cbr\u003e\u003cstrong\u003eTEST RESULT:\u003c\/strong\u003e \u003cstrong\u003eVERY STRONG\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eValve 1: Gm = 5350 ; Ia = 54 mA\u003c\/li\u003e\n\u003cli\u003eValve 2: Gm = 5250 ; Ia = 53 mA\u003c\/li\u003e\n\u003cli\u003eValve 3: Gm = 5250 ; Ia = 54 mA\u003c\/li\u003e\n\u003cli\u003eValve 4: Gm = 5200 ; Ia = 57 mA\u003c\/li\u003e\n\u003c\/ul\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\u003cmeta charset=\"utf-8\"\u003e Standard. Tested and approved for use in hi-fi and guitar amplifiers.\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\u003eCosmetic condition:\u003c\/strong\u003e Excellent – Excellently preserved lettering, minimal signs of wear. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e KT - Manufactured in CANADA in July 1964\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GE","offers":[{"title":"Default Title","offer_id":43659321245943,"sku":"01069","price":229.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/products\/5881-6l6wgb-ge-brown-base-side-oo-getter-matched-tubes-made-in-canada-at-test-nos-394624.jpg?v=1671130174","url":"https:\/\/vacuumtubestreasures.com\/en-de\/products\/5881-6l6wgb-ge-brown-base-side-oo-getter-matched-tubes-made-in-canada-en","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}