Like the IR-X that was launched in September 2023, it described by Friedman “as a genuine preamp in every way”, and at the heart of its design lies a pair of 12ax7 tubes running at high voltage. And ...

Recognizing the nonlinear behavior of the 12AX7 vacuum tube, used in audio and old op-amp applications, Dr. Dyer compares various models for fit to real-world device data. Given appropriate models ...

Neon discharge tubes can be modeled simplistically. The active components, two 12AX7 vacuum tubes, are popular in the audiophile and musical instrument community. Vacuum tubes: They’ve been with ...