Ray Tubes SELECT 12AU7
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 favorites.
● 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
Sound Characteristics
Sound Characteristics 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
Our Quality Control
Our Quality Control Each tube undergoes a seven-step quality control process, including a 24-hour burn-in period, stress tests to minimize microphonics, and critical parameters that are carefully measured to ensure consistency and accurate matching. Finally, sound engineers assess each tube under real-world listening conditions.
By the end of the quality control process, only 5% of tubes commissioned for production meet Ray Tubesʼ standards.
Our Warranty
Books have been written about the countless ways vacuum tubes can and do fail. With most manufacturers, and all New Old Stock, a tube failure leaves the user high and dry. Ray Tubes is different. All Ray Tubes products are backed by the Ray Tubes One Year Warranty, which covers manufacturing defects for twelve months from the date of purchase.
SELECT 12AX7 Specifications
|
Specification |
Value |
|
Tube Socket |
9-pin |
|
Max Anode Dissipation Power |
1 W |
|
Max Anode Voltage |
300 V |
|
Max Screen Voltage |
N/A |
|
Max Grid Voltage |
~50 V |
| Heater Voltage |
6.3V |
|
Heater Current |
0.3 A |
|
Transconductance |
1.6 mA/V |
|
Amplification Factor |
100 |
|
Internal Resistance |
62.5 kΩ |
ThomasAndStereo
Ray Tubes Select/Reserve KT88
