Once a discarded relic, over the years the humble vacuum tube has ... with a popular choice being headphone amplifiers that use a tube as a gain stage followed by an op-amp as a buffer with ...

There’s a mystique among both audiophiles and musicians about vacuum technology, thus having a tube amp still carries a bit of a cachet. New ones can be bought for eye-watering prices and old ...

Starting at $2,995, the Fezz Audio Equinox Vacuum Tube DAC is the most affordable D/A converter with Lampizator technology. The new Fezz Audio Equinox Vacuum Tube DAC ($2,995) is the only Lampizator ...

Part 5 provides spec summary of the GP/R K2-W vacuum-tube op amp and discusses measurement constraints/conditions and LTspice modeled output. The K2-W vacuum-tube op ...

After a brief review of the history of the K2-W vacuum-tube op amp, an LTspice model is used to create its schematic in preparation for SPICE simulation. The availability of hierarchical blocks ...