The 12AX7 vacuum tube is a type of preamp tube that is commonly used in guitar amplifiers, as well as in other audio equipment. It is a small, glass tube that contains a series of electrodes and a vacuum. When an electric current is applied to the tube, the electrons flow from one electrode to another, producing an amplified signal.

12AX7

The 12AX7 tube is commonly used in vintage guitar amplifiers, as well as in modern tube amps that seek to replicate that classic tone.

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Ei Tube

Ei Tube refers to those valve (plate) tubes, most known being Ei Ecc83 / 12AX7 tubes produced in the former Yugoslavia by Electronic Industry Nis (El Nis / Holding Korporacija Elektronska Industrija a.d. Nis).

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