It ended with a string of successes – a working vacuum chamber, light bulbs, glow tubes, diodes, and eventually this homebrew power triode and the audio amplifier built around it. [Simplifier ...

If you were building a tube amplifier in the early 1990s, you were a significant outlier. The warm glow of a tube amplifier ... In particular the world of audio has begun to chase the elusive ...

I tested a pair of Écoute Headphones to figure out what's going on with them and have a sample for you. 0:00 intro 5:06 Audio ...

The Cambridge Audio CXA81 ... a combination of vacuum tubes and solid-state circuitry for gorgeous sound with high power. The ...