{"product_id":"tad-ez81-6ca4","title":"TAD Tube Amp Doctor EZ81\/6CA4, Selected","description":"\u003cspan style=\"font-family: Verdana; color: #112244;\"\u003eGet your \u003cspan style=\"font-weight: bold;\"\u003eTAD Tube Amp Doctor EZ81\/6CA4, Premium Selected\u003c\/span\u003e tubes at \u003cspan style=\"font-weight: bold; color: #339966;\"\u003eHumbucker Music\u003c\/span\u003e!  As one of the largest dealers of high-end amplifiers in the world, we know and understand tubes (and the amps they go in). TAD tubes are carefully selected and undergo very strict quality control before being offered for sale. If they don't past this rigorous testing, they are not chosed to be TAD tubes. We highly endorse TAD replacement tubes for any high-end or boutique amplifier!\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244; font-weight: bold;\"\u003eDescription:\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e\u003cspan style=\"font-family: Verdana; color: #112244;\"\u003eThe TAD EZ81 \/ 6CA4 is a small rectifier tube for 6.3V filaments. It is used in smaller amps, such as the Marshall 1974X or the TAD 18W Plexi Kit, Silvertone amps and in various Hammond organ amplifiers. It is a true full power EZ81. Also used in many audio amps and in old tube radios.\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003eQ: When does a preamp tube become a Premium Selected tube?\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003eA: All preamp tubes labeled Premium Selected have passed the following tests:\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003e-    Low Noise Test\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003e-    Microphonic Test\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003e-    Gain Test\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003e-    Sonic Tests\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003e-    Shock Tests\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003e-    Listening Tests\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003e-    Balanced Output Test\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003eMatching and Selecting Options for Preamp Tubes\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003eMatching in Pairs for preamp tubes means that two tubes show identical gain, hence, four characteristically identical systems. \u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003eThis matching method includes our Balance-Selection. We highly recommend this matching method for hi-fi systems.\u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003eTAD Premium Selected\/Highgrade tubes are guaranteed for a period of 6 months (according to terms of warranties) \u003c\/span\u003e\u003cbr style=\"font-family: Verdana; color: #112244;\"\u003e \u003cspan style=\"font-family: Verdana; color: #112244;\"\u003efor the quality criteria mentioned above.\u003c\/span\u003e","brand":"TAD","offers":[{"title":"Default Title","offer_id":687877324801,"sku":"TAD-RT506","price":19.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/4003\/products\/TAD_EZ81.JPG?v=1516140645","url":"https:\/\/www.humbuckermusic.mom\/products\/tad-ez81-6ca4","provider":"Humbucker Music","version":"1.0","type":"link"}