The design is inspired by the guitar amps of the 1950s and 1960s ... single-ended one with a two stage double triode preamp and a single power output tube. The transformers are usually the ...

The company’s newest headphone amplifier, the Valhalla 3, isn’t just a new-and-improved version of the Valhalla 2, which had ...

[Keri Szafir] is no exception, and she’s produced a stereo tube amp with a few modern features. Electrically it’s a relatively conventional single-ended design using a double triode and a ...

DOUBLE TROUBLE, SINGULAR SOUND Once you’ve ... of a piezo along with the primary magnetic tone using a traditional tube amp.