{"product_id":"tad-tube-amp-doctor-6550a-matched-quartet-premium-selected","title":"TAD Tube Amp Doctor 6550A, Matched Quartet, Premium Selected","description":"\u003cspan\u003eNEW VERSION: Since Sept. 2010, the TAD 6550A-STR has been manufactured with a stronger and exceptionally pure anode material combination. In conjunction with the extended TAD burn-in and formating process, the 6550A-STR reaches an outstanding consistency and stability and outperformes even the 6550C -C-. \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThis makes the 6550A-STR withstand even the most critical application like e.g. the Ampeg SVT. \u003c\/span\u003e\u003cbr\u003e\u003cb\u003e(Fits only without the tube retainer!)\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe TAD 6550A-STR is a true remake of the vintage GE 6550A with a heavy, straight glass envelope, polished metal base and the authentic triple getter construction. A balanced tube, known for its incredible bottom end and rich mids. Smooth, liquid bass, natural sounding tone and a wide open character make this tube extremely popular for bass guitar amps and High End Hi-Fi applications. \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe ratings of the TAD 6550C-STR meet or exceed those of the classic 6550A tubes. It performs superbly in any application asking for 6550.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eQ: When does a power tube become a \u003c\/span\u003e\u003ci\u003ePremium Selected\u003c\/i\u003e\u003cspan\u003e power tube?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: All power tubes labeled \u003c\/span\u003e\u003ci\u003ePremium Selected\u003c\/i\u003e\u003cspan\u003e have passed the following tests:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Plate Current (PC) and Amplification (TC)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Low Noise Test\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Microphonic Test\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Sonic Tests\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Shock Tests\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Listening Tests\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Shorts \u0026amp; Leakage Tests\u003c\/span\u003e","brand":"TAD","offers":[{"title":"Default","offer_id":794443022337,"sku":"TAD-RT884","price":198.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/4003\/products\/TAD_6550_qtr.JPG?v=1516385022","url":"https:\/\/www.humbuckermusic.mom\/products\/tad-tube-amp-doctor-6550a-matched-quartet-premium-selected","provider":"Humbucker Music","version":"1.0","type":"link"}