6550/KT88

The 6550 is an American designed beam power tetrode developed by Tung-Sol in 1955. it was used in Marshall amplifiers imported to the USA, Ampeg amplifiers, and later versions of the Leslie speaker. Marshall amplifiers using the 6550 are generally cleaner and break up at higher volume levels.

The KT88 is a very similar European version of this tube and is interchangeable in most circumstances. KT stands for "kinkless tetrode". A single pair of these tubes is cabable of delivering 100 watts or more of clean power. If you are looking for less distortion than a 6550, the KT88 may be for you.
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    Valve Art Power Vacuum Tube, KT88 SKU#: T-VA-KT88
    $35.50
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    Valve Art Power Vacuum Tube, 6550 SKU#: T-VA-6550
    $31.95
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    Sovtek Power Vacuum Tube, 6550WE SKU#: T-SOV-6550
    $32.70
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    JJ Power Vacuum Tube, KT88 Blue Glass SKU#: T-JJ-KT88-BU
    $49.95
  5. Rating:
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    JJ Power Vacuum Tube, KT88 SKU#: T-JJ-KT88
    $43.45
  6. Rating:
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    JJ Power Vacuum Tube, 6550 SKU#: T-JJ-6550
    $44.83
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    Electro-Harmonix Power Vacuum Tube, KT88 SKU#: T-EH-KT88
    $38.75
  8. Rating:
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    Electro-Harmonix Power Vacuum Tube, 6550 SKU#: T-EH-6550
    $37.85
  9. Rating:
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    Ruby Power Vacuum Tube, 6550A-STR SKU#: T-RBY-6550
    $32.95
    Out of stock
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