The New Sensor Corporation has been taken over by the Tung-Sol company. This particular new version of the Tungsol tube is manufactured at the Xo-Pul manufacturing plant (also known as Reflektor) in Saratov, Russia. Even though the tubes are made in Russia, New Sensor is actually owned by a corporation in the United States. Since [...]

As in many kinds of technical equipment, descriptions of parts, functions, and in this case sounds are clichéd, but I can say that the Tung-Sol 12AX7 can be easily compared to the Chinese 12AX7 through their gain and drive and it also has the pure tone of the U.K’s Mullard or Brimar. The Tung-Sol 12AX7’s [...]

With several improvements in construction, the JJ ECC83-S tube, also known as the Ei12AX7, is structured better than its predecessor. It has a different design plate than that which is found in many other 12AX7’s. This tube appears to be rough and rugged enough for any musician who wants to hit the road. Its small [...]

The Ei ECC83 / 12AX7, one of the most terrific performing tube in production currently, is a version similar to the well-known”flat plate” Telefunken pre-amp tube. The Ei 12AX7 tube is not designed for guitars, however, even though it has excellent tone. It is best used for professional and home audiophiles. (However, they are not [...]

The BLACK SABLE Tung-Sol 12AX7 gold pin is a newly produced tube created in the very same factory which makes the production of the Mullard and Genalex Gold Lion lines. This Tung-Sol 12AX7 contains gold pins to improve electrical conductivity and resist corrosion. This tube is perfect for the musicians who wish to obtain the [...]

This JJEC803 is one of the finest quality tubes and will serve to replace any 12AX7 / ECC83 type. We bought these tubes believing that they were NOS Tesla ECC803S tubes. We found out, however, that they were actually JJ Electronic ECC803S tubes incorrectly labeled as Tesla. Because they are a completely new production line [...]

The ECC83 / 12AX7 Telefunken with its ribbed plate diamond bottom is legendary. Because these having a wonderfully smooth response with articulated bass, this tube is one of the most sought after 12X7 tubes that are on the market. Because of their high quality and vintage nature, they are extremely rare and difficult to get. [...]

The Sovtek 5751, sometimes used as a 12AX7, is actually a reasonably prices alternative for traditional Fender tweed amps. It can also be substituted for a 12AT7 reverb driver tube. It’s only weakness is that it has only 70% of the gain of the 12AX7. The 5751 are frequently used to tame amps that have [...]

These quality tubes have nearly the same sound. The only tiny difference one can hear is some additional gain from the WB model. They are also rough and rugged, and that may be the reason that they are often used as OEM components by many of the biggest amp makers. Both of these are so [...]

The German brand, the RFT ECC83 / 12AX7 is a low microphonics tube that should take some wear and last a long time. The RFT ECC83 is often preferred for the terrific hard rock “crunch” in the Marshall, Mesa-Boogie, and other amplifiers of this nature. Their sounds are a bit darker than is found in [...]