{"product_id":"1x-telefunken-ef804s-on-bottom-berlin-1955-nos","title":"1x Telefunken EF804s  ◇ on Bottom - Berlin 1955 - NOS","description":"\u003cdiv\u003e\u003cb\u003e\u003cspan style=\"color: #2a633a; font-family: Arial; font-size: large;\"\u003eProduct Summary\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003e\u003cspan style=\"color: #2a633a; font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cb\u003eModel: \u003c\/b\u003e1955 Telefunken EF804S (Made in Germany)\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\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cb\u003eSoundlumia Tube Sound Rating\u003c\/b\u003e: \u003cb\u003e\u003cspan style=\"color: #7f160e;\"\u003e9.5\/10 - Outstanding \u003c\/span\u003e\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;\"\u003eEarly 1960s Ulm, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity\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;\"\u003e\u003cb\u003eDate codes:\u003cspan style=\"color: #833e15;\"\u003e \u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cb\u003e\u003cspan style=\"color: #7f160e;\"\u003eB as\u003c\/span\u003e \u003c\/b\u003e01 (\u003cb\u003e\u003cspan style=\"color: #7f160e;\"\u003eB = Berlin, West Germany, as = August 1963\u003c\/span\u003e\u003c\/b\u003e, 01 = internal #)\u003c\/span\u003e\n\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\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cb\u003eGM (Mutual Conductance) test result\u003c\/b\u003e: 100% of NOS\/NEW\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;\"\u003e\u003cb\u003eSilkscreen\u003c\/b\u003e: 90% - 100%\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;\"\u003e\u003cb\u003ePackaging\u003c\/b\u003e: New white boxes.\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\u003cb style=\"color: #2a633a;\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eProfessional Tube Testing\u003c\/span\u003e\u003c\/b\u003e\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\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\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\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\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eThis tube tested \u003cb\u003eNear NOS \u003c\/b\u003e(90%+ mutual conductance value for NOS\/NEW) on a reliable Mercury 2000 tube tester with the following result (mutual conductance both in \u003cspan style=\"color: #393731;\"\u003euMhos and in percentage of NOS\/NEW value\u003c\/span\u003e\u003cspan style=\"color: #444444;\"\u003e): \u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cb\u003e2,500\u003c\/b\u003e\u003cb\u003e(100%)\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eGood tubes start at \u003cb\u003e1,200\u003c\/b\u003e and new tubes (incl. NOS\/NIB) \u003cb\u003e2,500\u003c\/b\u003e, and the Mercury 2000's rated mutual conductance for new EF86 tube is \u003cb\u003e2,500\u003c\/b\u003e. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, it's actually quite straightforward: mutual conductance directly translates to \u003cb\u003e\u003cspan style=\"color: #2a633a;\"\u003ea tube's ability to amplify sound\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-weight: bold; color: #2a633a;\"\u003e,\u003c\/span\u003e so the higher the numbers the better. \u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Telefunken","offers":[{"title":"Default Title","offer_id":48229251383616,"sku":"266757971945","price":154.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/2388\/5888\/files\/photo_1038457283410680762.png?v=1713120121","url":"https:\/\/www.soundlumia.com\/ja\/products\/1x-telefunken-ef804s-on-bottom-berlin-1955-nos","provider":"Soundlumia","version":"1.0","type":"link"}