A conventional tube amplifier has a circuit whose fundamentals were well in place around a hundred years ago, so there are few surprises to be found in building one today. Nevertheless, building on… ...

Priced from $10,000, the Feliks Audio Envy Meisterwerk headphone amplifier features all analog circuitry with 300B vacuum tubes.

We've been listening to a lot of integrated amplifiers over the past 12 months, and these 4 are some of the best below $3,000.