It was with considerable interest last month that I set out to track down where in the world there are still factories making tubes. My research found them in Slovakia, Russia, and China, and it&#8… ...

Naturally, which stereo amplifier you choose will greatly impact your overall system performance, so you want a best-in-class performer that also offers the physical connections your sources need.

There are few greater follies in the world of electronics than that of an electronic engineering student who has just discovered the world of hi-fi audio. I was once that electronic engineering stu… ...

The amplifier offers the means of magnifying varying electro-motive forces and currents, otherwise imperceptible, so that they come within the range of ordinary laboratory measuring and recording ...

Copland’s CTA407 is a fuss-free valve amplifier. It is well made, decently equipped and sounds lovely ...

Analogue valve amplifiers, which are set using a screwdriver, are still justified today in some applications to facilitate the commissioning, fault diagnosis and maintenance of proportional valves ...

Normally a valve amp leaves its components exposed to aid cooling of the hot vacuum tubes, but Futatsumata’s design encases everything in a smooth metal heat-sink — even the dials are aluminum ...

Martin Young of IMS Electronics has launched a hybrid tube amp on Kickstarter that's undoubtedly something of a looker. But the Desktop Valve Amplifier – housed in an enclosure machined from a ...

Old-style valve amplifiers are the real ale of the technology world. Both are handcrafted lovingly in rural backwaters of Britain, and both have a long-standing tendency to attract middle-aged men ...

In addition, valve amps give musicians more options - thanks to the physics of how valves work. If you overdrive push a little, only the top of the sound wave is flattened.

Since the Mal Valve is one of the rare headphone amplifiers that can drive electrostatic and dynamic headphones, I also auditioned the sound with a pair of Stax SR 007 electrostatics.