6550 / KT88 / KT90

KT88's generate a lot power, handling significantly more plate voltage than other power tubes. As a result, KT88's and 6550's are produce cleaner tones and have low distortion, making it popular amongst bass amplifiers and high end audio applications.



  • ANOS GE 6550

    NOS-6550-A
    $99.00
    ANOS GE 6550. Only unmatched singles available.
  • ANOS Genelex/GEC KT88

    ANOS Genelex/GEC KT88
    $299.95
    ANOS Genelex GEC Gold Lion KT88 originals, not the reissue.
  • ANOS Tung-Sol 6550

    ANOS Tung-Sol 6550
    $124.95
    ANOS Tung-Sol 6550 originals, not the reissue.
  • Electro Harmonix KT88

    Electro-Harmonix-KT88
    $69.95
    Great tonal character for the price. In stock.
  • Gift Card 2022

    Gift Card 2022

    From: $25.00

    To: $100.00

    Doug's Tubes Gift Card 2022
  • JJ KT88

    JJ KT88
    $51.95
    Detailed character, tightly compressed bottom end. singles only. ****LIMIT 1****
  • Svetlana winged =C= KT88

    New Old Stock winged =C= KT88
    $129.95
    New old stock, pre winged =C= vintage 1990's until 2000. VERY RARE! Silver ~S~ logo.
  • Valve Art 6550

    Valve Art 6550
    $59.95
    Valve Art 6550 by Shuguang.

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