Ray Tubes SELECT 12AX7
The 12AX7 vacuum tube was introduced in 1947 as a replacement for the earlier 6SL7 family of dual triodes, all of which were used extensively in audio applications. As one of a handful of small signal tubes
that have remained in production since their first use, the 12AX7 is commonly found in the pre-amp stage of tube amplifiers and is especially associated with the emerging electric guitar sound of the 1950s.
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
The SELECT 12AX7 delivers clear and natural sound, perfect for users who
prioritize mid-to-high frequencies and complex arrangements.
● The bass has a precise low-end response, making it ideal for fast-paced
genres.
● The midrange frequencies are delicate and well-layered. Vocals are
impressively expressive, with a natural and authentic sound.
● The treble performance is clear and bright, offering a well-balanced
overall sound with abundant detail.
● The dynamics are rich and precise, capturing subtle changes accurately.
The soundstage is expansive with a strong sense of space.
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 12AU7 Specifications
|
Specification |
Value |
|
Tube Socket |
9-pin |
|
Max Anode Dissipation Power |
2.75 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 |
2.2 mA/V |
|
Amplification Factor |
17 |
|
Internal Resistance |
7.7 kΩ |
ThomasAndStereo
Ray Tubes Select 12AX7
