Milbert Amplifiers


The Most Musical Amplifiers. Made in USA since 1986.

12AX7 is a miniature high-mu (AKA high gain and high transconductance) twin triode. Each triode section has separate cathode connections. 12AX7 was originally introduced in 1947 by RCA and was originally intended for voltage amplifier, phase inverter and multi-vibrator or oscillator application. After almost 60 years, 12AX7 still sees wide use in guitar amplifiers, audio amplifiers and ever growing list of recording equipments.

Current Production:

12AX7 equivalent tubes are being produced at Reflektor, Ei, JJ and Chinese factories today. Current production 12AX7 on market today are:

Plug compatible variations

Other variations of 12AX7:

Source: BOI Audio Works

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Last modified 22 Feb 2021

Milbert Amplifiers, The Most Musical Amplifiers. Made in USA since 1986.
Milbert Amplifiers
The Most Musical Amplifiers
Made in USA since 1986

8051 Citation Drive #C
Gaithersburg, MD 20877 USA
phone 202-558-5502