Tube amplifiers were supposed to be passé by now. Following World War II, transistor, or solid-state, amplification was to be the order of the day. Transistors were expected to replace vacuum tubes ...

Vacuum tube amplifiers just won’t go away. I am speaking more of audio vacuum tube amps than I am of microwave amps like magnetrons, klystrons, TWTs and the like. Most other audio gear is solid state ...

At very low volume those higher level terms add almost nothing for either type amplifier, but when you run at volume level 10, those higher level terms add bunches of harmonics and especially the even ...

Solid-state technology all but obliterated the vacuum tube market in the early 1960s. So why are tubes still popular with audiophiles and musicians? Ex-movie theater projectionist Steve Guttenberg has ...