Ray Tubes CORE 12AU7

CORE 12AU7

Introduced in 1946, the 12AU7 was the world's 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, you'll find it in the pre-amp phase of tube amplifiers, where it functions as a phase inverter or driver.

Product Highlights

CORE is the Ray Tubes entry tier. Built new for audio, measured, matched, and covered by the Ray Tubes One Year Warranty.

• Designed and manufactured by a team with decades of experience
• Hand-selected specifically for use in audio applications
• Substantially more consistent performance than New Old Stock
• Unlike NOS and most other new production, covered by the Ray Tubes
  One Year Warranty

Sounds Characteristics 

The CORE 12AU7 provides a clear and natural sound, with a midrange built for warmth and smoothness in compact systems.

• The bass is mild and balanced, well-suited for light music and medium-small dynamic audio.
• The midrange frequencies are clear, natural, and warm. Female vocals are particularly vibrant.
• The treble performance is detailed and non-fatiguing, good for extended listening sessions.
• The dynamics are well balanced and the soundstage is of medium size with good positioning, making it ideal for compact audio systems.

Package Contents

• Available as a single tube ( RT-CO-12AU7-X1 ) or matched pair
  ( RT-CO-12AU7-X2 )
• User handbook featuring burn-in guidelines
• Certificate of authenticity and warranty