Tubes are now back in stock!

KT88 / KT90 / KT120

KT88 tube is a low distortion, high-output power tube explicitly developed for audio.

We stock quality KT88 tubes for audio and guitar applications. Due to the power capability of these tubes, the KT88 tubes should be matched closely for the best results.

Our KT88 tube sets are precision matched on our custom equipment and hand-selected by our staff for the best results.

KT90, KT120, and KT150 are higher-powered replacements of KT88. In most cases, you can use these tubes in place of KT88, but it's best to check with your amp manufacturer first.

KT88 is also upwards compatible with 6550 tubes. You can use KT88 in place of 6550 tubes in most cases.

Scroll down to see sets of 2 (pair), 4 (quad), and 6 (sextet). Feel free to inquire if you don't see the sets you want.

Our KT88 sets are burned-in for 24 hours for maximum stability, then precision matched. We do not charge extra fees for burn-in or matching.