$38.99

TAD 7025-S 12AX7 ECC83 Cryo Vacuum Tube
[12AX7 , ECC8]

TAD 7025-S 12AX7 ECC83 Cryo Vacuum Tube

The new TAD 7025-S is a faithful reproduction of the legendary original Mullard ECC83 valve which was made in England till the late 1960s.

This tube is regarded as the holy grail among the double-triode preamp valves. The extra thick mica spacers support the rugged mechanical construction and the careful TAD quality control proceedure ensures performance stability and low microphonics. The TAD 7025S delivers rich, harmonically complex tone and midrange warmth that is just outstanding compared to any other currently manufactured tube today. TAD recommends this tube for classic British style amps as well as for vintage-style open-back combo amps to achieve a stunning complex tone with silky smooth but rich tone.

The TAD 7025-S can replace any ECC83, E83CC, 12AX7, 12AX7A, 12AX7M, 12AX7WA/WB/WC/LPS/EH, 5751 or 7025. Great for warm clean tones and creamy overdrive. Upgrades 12AX7A and ECC83,E83CC tubes. Somewhat warmer in tone than the 7025 Highgrade (RT010) yet open with defined bass response.

Cryoset Deep Cryogenic Treatment:
The process makes a permanent change and the benefits do not deteriorate over time or upon return to operating temperature, it changes the whole way the vacuum tube performs. The major benefit has been a dramatic improvement in dynamic range,micro detail with an increase in speed. Bass response has been clearer with a reduction in microphonics. The proprietary Cryoset treatment process utilizes a computer controlled, cryogenic chamber to very gradually reduce the temperature of the tubes to 300 degrees below zero (Fahrenheit) and holding them there for a minimum of 24 hours. After the extended dwell at this cryogenic temperature, the vacuum tubes are then very slowly brought up to ambient temperature over the next 24 hours and stabilized. The process is a "dry" one that utilizes liquid nitrogen as a cryogen that is flashed into the chamber. The tubes are never exposed to the actual liquid. All these processes are microprocessor controlled under strict and verifiable conditions.

Scientists have known for years that material transformations occur when they are exposed to cryogenic temperatures. Many of the early discoveries were more fully explored by NASA engineers who were trying to understand what would happen to metals when subjected to the extreme temperatures of space. Today, a wide range of commercial items from softball bats to race engines are cryogenically treated to improve their performance by enhancing the material properties with "cold treating" or cryogenic processing. This technology brings practical application to audio and other electrical components as well. Cryogenic treatment modifies the microstructure of the metals used in critical electronic components by reducing or eliminating voids and imperfections in the material. Crystal structures (or grains) has been shown to be modified after cryogenic treatment, creating a more uniform or homogenous microstructure. The thermal dissipation properties of the metals are improved, reducing hot spots and further contributing to extended life and improved performance. In addition, the physical contraction of the metals while under the deep freeze imparts a mechanical compression on the metals that contributes to improved signal transmission quality and speed. The materials used in electronics are highly fabricated and the manufacturing processes used impart or induce stresses in them.

In addition, welding and soldering adds additional stress from concentrated areas of heating. Most everyone recognizes that welded components often fail at the weld -- a "weak" spot. The weakness comes from residual stresses inherent in all materials, further exacerbated by manufacturing techniques or processes. Cryogenic treatment relieves stresses and normalizes (or stabilizes) welded and soldered areas. This mechanism is founded in the observation first made by Bose and later by Einstein, that matter is at it most relaxed state when it has the least amount of kinetic energy (or molecular activity). Absolute zero (-459 Fahrenheit) is that point where no more energy can be extracted, or when a material is at its most "relaxed" state.

While our Cryoset (R) thermal treatment does not get to absolute zero, you can understand how going to minus 300 degrees Fahrenheit for an extended dwell time enables the material to become more relaxed and stress relieved. The transformations as a result of cryogenic treatment is permanent, and does not change with time.

The bottom line - Cryogenically treated tubes are simply better sounding, more dynamic, have a lower noise floor and are more musical than raw stock - off the shelf stock tubes.

Choose Cryoset tubes when only the best will do.



Available Options:

Matched:

Reviews

Quick Find
 
Use keywords to find the product you are looking for.
Advanced Search
Manufacturer Info
TAD / Tube Amplifier Doctor
Other products
Share Product
Share via E-Mail Share on Facebook Share on Twitter Share on Google Buzz Share on Digg
Discount10
Comodo SSL Certificate