7 rated 6550/KT88 tubes, 301 reader votes in total. Ranked by average star rating; ties go to the tube with more votes.
Ranked: 3 or more votes
- GE 6550 Triple Getter4.2 · 27 votes
- Svetlana SED Winged C 6550C Russia4.2 · 47 votes
- Shuguang Black Treasure KT88-Z3.7 · 65 votes
- Genalex Gold Lion KT88 Russia3.6 · 30 votes
- Mullard KT88 Russia3.5 · 94 votes
- Electro-Harmonix KT883.5 · 24 votes
- Penta Labs KT88SC3.1 · 14 votes
