How can a nuvistor (or any other device) be both "excellent sounding" and "extremely neutral"? If it is neutral it has no sound, no speed and no dynamics - it merely passes on whatever is in the source music signal.
Nuvistors were designed to be small, rugged and low noise at high frequencies (e.g. VHF, UHF). I doubt if audio linearity featured highly on their spec list.
Nuvistors were designed to be small, rugged and low noise at high frequencies (e.g. VHF, UHF). I doubt if audio linearity featured highly on their spec list.
6DJ8 was designed to be small rugged and low noise at high frequencies as a cascode amplifier (for VHF TV Tuners), but widely used as an audio tube.
6DJ8 was also intended to be linear. Some nuvistors were intended to be semi-remote cutoff so some AGC could be applied.
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