{"product_id":"mullard-cv491-long-plates-square-getter","title":"Mullard CV491 Long Plates Square Getter","description":"\u003cdiv\u003e\n\u003cb style=\"color: rgb(42, 99, 58); font-family: Arial; font-size: large;\"\u003e\u003cspan\u003e\u003c!--StartFragment--\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb style=\"color: rgb(42, 99, 58); font-family: Arial; font-size: large;\"\u003eSoundlumia's Opinion\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eNo other tubes can deliver vocals like the British-made Mullard's, and that's a fact. These ECC82 tubes, especially the vintage 1950s ones, are extremely hard to find today and are becoming every serious audiophile's darling. \u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cb style=\"color: rgb(42, 99, 58);\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eThe overall tonality of Mullard ECC82 tubes is warm and lively with a very spacious sound stage. \"Like a warm British jacket of the finest tweed, these glorious tubes have an attractive sweet warmth in their midrange and lower regions.\"  This is how the experts on audiotubes.com describe the sound signature of British-made Mullard tubes. The top end is silky and pleasant and doesn't get rolled off. They retain a fine sense of \"air\" at the top, and the upper midrange is smooth and liquid. These tubes reproduce the human voice, especially female voices, with haunting realism. The British made Mullard tubes are also known to have an attractive sparkle at the top with rich bass...now we know where that \"warm British jacket\" comes from!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cb\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eSingle Tube ( Blackburn 1955 - Strong )\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cb\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e1x Mullard CV491 Long Plates Square Getter - Blackburn 1955 - Strong\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-size: 14pt; line-height: 23.7417px; font-family: 'Liberation Serif', 'Liberation Serif_EmbeddedFont', 'Liberation Serif_MSFontService', sans-serif;\" data-ccp-props='{\"134245417\":true,\"335559738\":0,\"335559739\":0}' class=\"EOP SCXW61629315 BCX0\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cb\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e$423.80\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large; color: rgb(255, 128, 0);\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: large; color: rgb(255, 128, 0);\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0809\/2388\/5888\/files\/product_specs_watermarked_a018578a-5401-48c8-9290-b9e14a988411.png?v=1772960703\"\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large; color: rgb(255, 128, 0);\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cb\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMatched Quad (Blackburn 1955 K61 - Near NOS)\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cb\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMullard CV491 Long Plates Square Getter Matched Quad Blackburn '55 K61 Near NOS\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"-webkit-user-drag: none; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; user-select: text; font-size: 14pt; line-height: 23.7417px; font-family: 'Liberation Serif', 'Liberation Serif_EmbeddedFont', 'Liberation Serif_MSFontService', sans-serif;\" data-ccp-props='{\"134245417\":true,\"335559738\":0,\"335559739\":0}' class=\"EOP SCXW61629315 BCX0\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cb\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e$\u003cspan style=\"font-family: Arial; font-size: large; color: rgb(255, 128, 0);\"\u003e\u003cspan\u003e1,862.00\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large; color: rgb(255, 128, 0);\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb style=\"color: rgb(42, 99, 58);\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eProfessional Tube Testing\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp class=\"MsoNormal\" style=\"background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eThis set was tested and certified by \u003cb\u003eRoeTest V11 Professional Tube Testing System\u003c\/b\u003e with the following result: \u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eTube 1: \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured transconductance(GM): 2.14\/2.05 mA\/V - 97%\/93% (100% = 2.2 mA\/V)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured plate current(IA): 14.237\/10.382 mA - 136%\/99% (100% = 10.5 mA)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eTube 2: \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured transconductance(GM): 2.19\/2.15 mA\/V - 100%\/98% (100% = 2.2 mA\/V)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured plate current(IA): 11.575\/11.32 mA - 110%\/108% (100% = 10.5 mA)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eTube 3: \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured transconductance(GM): 2.07\/2.04 mA\/V - 94%\/93% (100% = 2.2 mA\/V)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured plate current(IA): 11.282\/10.975 mA - 107%\/105% (100% = 10.5 mA)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eTube 4: \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured transconductance(GM): 2.06\/2.01 mA\/V - 94%\/91% (100% = 2.2 mA\/V)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured plate current(IA): 10.39\/11.035 mA - 99%\/105% (100% = 10.5 mA)\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eNO shorts, leakage or gas. NO noise or microphonics.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eCurve trace is also included in the original RoeTest report.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #2a633a; font-family: Arial; font-size: large;\"\u003e\u003cb\u003eAppearance \u0026amp; cosmetic condition\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eSilkscreen: 98% - 100%\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eDate code(s): \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cb\u003eK61 B5K \u003c\/b\u003e\u003c\/span\u003e\u003cb style=\"font-family: Arial; font-size: large;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003e(K61 = ECC82 Long Plates production gen #1,\u003c\/span\u003e B = Blackburn, 5 = 1955\u003cspan style=\"font-weight: 400;\"\u003e, K = Nov.)\u003c\/span\u003e\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eKB\/DA ( KB = manufacture under UK Authority, DA = Blackburn )\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mullard","offers":[{"title":"Matched Quad \/ Blackburn 1955 K61 - Near NOS","offer_id":50322501009728,"sku":"","price":1862.0,"currency_code":"USD","in_stock":true},{"title":"Single Tube \/ Blackburn 1955 - Strong","offer_id":51601704976704,"sku":null,"price":423.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/2388\/5888\/files\/20250225_004256631_iOS.heic?v=1740457580","url":"https:\/\/www.soundlumia.com\/it\/products\/mullard-cv491-long-plates-square-getter","provider":"Soundlumia","version":"1.0","type":"link"}