Genalex / Gold Lion KT66 is an exact replica of the original clear glass KT66 tube, renowned for producing “The Bluesbreaker Tone.” This tube was utilized in popular hi-fi equipment from the 1950s and 1960s, including the Heathkit W-5M and various Leak amplifiers.

It is a super premium power beam tet and precise reproduction of the original clear glass KT66, in the early Marshall amplifiers that shaped Eric Clapton’s “Blues” tone. It delivers a full sound with enhanced bass response a shimmering top.

To earn the Genalex Gold Lion designation tubes must undergo and successfully pass the most stringent testing available in the industry