We do not treat NOS tubes as trophies.
For Analogue Alchemy, a tube matters only when it serves the music. Each tube is selected for use in living systems — measured, burned-in, matched where required, and evaluated by listening.
Some tubes are rare.
That is not the point.
The point is stability, character, and musical fit.
Availability varies. Quality does not.
Follow our tube notes on Instagram: measurements, matching, listening impressions, and the stories behind selected valves.
NOS Tubes & Selection