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Ray Vacuum Tube – 12AU7

Ray Vacuum Tube – 12AU7


SKU R12AU7S Category Tags , , ,
Weight 20 kg
Dimensions 12 × 8 × 20 cm

Single, Matched Pair

Product highlights

  • Matched pair (2 tubes) or single tube (1 tube)
  • 12-month warranty against manufacturing defects
  • Hand-selected and tested
  • Gold pins for corrosion resistance and excellent conduction
  • A substantial upgrade from standard NOS tubes
  • Low noise and microphonics
  • Only 4% of the tubes commissioned for production meet our standards for gain and conductance matching


The New Standard: Hand-Selected and Rigorously Tested

Unlike most tubes available today that are New Old Stock (NOS), ours are brand new, hand-selected, and rigorously-tested to meet our strict quality standards. By bypassing the unpredictable quality of NOS and instead choosing our freshly minted tubes, we’re making the sublime audio experience of vacuum tubes more accessible.

Sonic Brilliance

With Ray Vacuum Tubes, your favourite tracks take on a whole new dimension. These tubes deliver sparkly and precise high-end with bass that’s punchy and tight. Hi-hats cut through with clarity, while vocals are soulful, textured, and realistic. With impressive depth and separation, these tubes promise sound that’s clear, resolving, and an absolute delight to your ears.

The Art of Selection

Our vacuum tubes aren’t just “off the shelf”. Each pair is brand new and carefully selected by our sound engineer for optimal gain, conductance, noise, and microphonics performance. The result? Only about 4% of the tubes we commission for production make the cut. These elite performers guarantee accurate sound staging and channel balance, promising you a listening experience that stands out from the crowd.

Gold Pins: Excellence in Every Detail

The Ray’s gold pins not only add a touch of elegance but also serve a significant purpose. Gold’s superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren’t just top-notch—they’re built to last.

Silk-Screen Printed Logos

Even our logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate our commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.

Settling into Your Soundscape

To get the most out of your Ray Tube, we recommend a burn-in time of at least 6 hours. Just plug the tubes in and leave the amplifier on. While there’s no need to play music during burn-in, you can if you’d like to hear for yourself how the tubes change over this remarkable period in their lifecycle.

Keeping Your Tubes Tip-Top

A little care can go a long way in extending the life of your Ray Tubes. Let them warm up for about 5 minutes before each listening session. When removing the tubes, pull vertically while applying a slight rocking motion back and forth.

Rest Easy

With warranty covering you for twelve months against manufacturing defects, you can relax knowing that your purchase is protected.



  • Tube type: 12AU7/ECC82/6189/CV4003
  • Socket: 9-pin


Compatible Amps

Note: This list is not comprehensive

  • xDuoo TA20 Plus
  • xDuoo TA-10R
  • xDuoo TA-22
  • xDuoo TA-30
  • xDuoo MT-603
  • xDuoo MU-603
  • Woo Audio WA7 Fireflies (3rd Gen)
  • Woo Audio WA7e Fireflies for Electrostatic Headphones
  • Woo Audio WAtp (Tube Power Supply)
  • Manley Audio Absolute
  • Bottlehead Crack 1.1 OTL
  • Bravo V2, V3
  • Bravo Ocean
  • Original OPA-2A, OPTA-3A
  • Cayin HA-1a MK2
  • Cayin HA-3A
  • Cocktail Audio HA500H


What’s included

  • Single Ray Vacuum Tube OR Matched Pair of Ray Vacuum Tubes
  • Manual booklet
Service center

8 800 555 04 71

Customer support

8 800 555 04 71