Ray Tubes 12AU7 Select vacuum tube

Introduced in 1946, the 12AU7 was the worldʼs first noval (nine-pin) vacuum tube. The 12AU7 is a double triode, consisting of two 6C4 tubes in a single envelope. Before the advent of solid-state electronics, it was valued for its versatility and portability. Nowadays, youʼll find it in the pre-amp phase of tube amplifiers, where it functions as a phase inverter or driver.

Product highlights

The Ray Tubes SELECT Collection offers the best tubes youʼll ever need. It goes above and beyond the baseline to bring out the best in all your favourites.

• Designed and manufactured by a team with decades of experience
• Hand-selected by engineers—only the top tubes make the cut
• Gold pins for durability and longevity
• Substantially more consistent performance than New Old Stock
• Unlike NOS and most other new production, covered by the Ray Tubes One Year Warranty

The SELECT 12AU7 delivers a well-balanced tonal signature with excellent resolution and dynamic sensitivity, resulting in a clear and layered sound.

• The bass is tight and well-controlled, with a focus on precision and clarity that makes it especially suitable for fast-paced music.
• The midrange frequencies are clear and well-resolved. Vocals sound natural with distinct layering and detail.
• The treble performance is smooth, bright, and airy. Ideal for listeners who value purity and micro-dynamic expression in their music.
• The dynamics are crisp and well-articulated, excelling at music with powerful rhythms. The soundstage has well-defined layering, enhancing the immersion of the listening experience.