Genalex / Gold Lion KT66 is an exact copy of the original clear glass KT66. The tube that created “The Bluesbreaker Tone.” used in 50’s-60’s hi-fi favorites such as the Heathkit W-5M and many Leak amplifiers.

Super Premium power beam tetrode & exact copy of the original clear glass KT66, used in the early Marshall amps which created Eric Clapton’s “Bluesbreaker" Tone.” Full sound with an improved bass response and shimmering top-end.

• Originally a British equivalent to 6L6 and a mainstay of the British hi-fi industry
• Used in 50’s-60’s hi-fi favorites such as the Heath W-5M and many Leak amplifiers

To be labeled Genalex Gold Lion, tubes must endure and pass the toughest testing the industry offers.