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Power Tubes
6550 / KT88 / KT90

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

$99.00

ANOS GE 6550. Only unmatched singles available.
ANOS Genelex/GEC KT88

$299.95

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

$124.95

ANOS Tung-Sol 6550 originals, not the reissue.

Electro Harmonix KT88

$69.95

Great tonal character for the price. In stock.
Gift Card 2022

From: $25.00

To: $100.00

Doug's Tubes Gift Card 2022
JJ KT88

$51.95

Detailed character, tightly compressed bottom end. singles only. ****LIMIT 1****

Ruby 6550A-STR

$59.95

Ruby 6550A-STR is a Chinese Shuguang(Sino equivalent) - selected by RUBY.
Ruby KT88-STR

$59.95

Select 3-hole plate KT88 made by Shuguang in China. Also re-marketed as Valve Art.
Ruby KT88V-STR ****OUT OF PRODUCTION***NLA

3 Review(s)

$0.00

Ruby KT88V-STR. ****NLA****

Svetlana 6550C

$69.95

Solid, reliable, lots of clean headroom.
Svetlana KT88SV

$69.95

Excellent tonal character. In stock.
Svetlana Winged =C= 6550

$109.95

Svetlana Winged "C" 6550. New old stock vintage 1998.

Svetlana winged =C= KT88

$129.95

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

$59.95

Valve Art 6550 by Shuguang.