At the extreme budget end of tube audio lie single-tube amplifiers usually using very cheap small-signal pentodes. They’ve appeared here before in various guises, and a fitting addition to those ...

Editor’s note: At the end of the MakerFaire in San Mateo, there is a “Bring a Hack Party “. That is where Ron Quan showed his tube headphone amplifier. Here’s quick circuit for driving high fidelity ...

If you want to hear how good your headphones can sound, try plugging them into Schiit Audio's Valhalla vacuum tube headphone amplifier. Ex-movie theater projectionist Steve Guttenberg has also worked ...

There’s a hidden gem on eBay and Amazon: the Yuanjing 6N11 headphone amplifier. Out of the box it’s OK, maybe even above average. With a few modifications, it becomes a really great-sounding headphone ...

Once a discarded relic, over the years the humble vacuum tube has been rehabilitated in the arena of specialist audio. There are plenty of tube amplifiers now being manufactured, with a popular choice ...

The GA-10 is an audiophile-grade headphone amplifier that features the SEPP (single-ended push-pull) circuit with eight vacuum tubes, a linear transformer, and direct tube output. The vacuum tubes ...

The new MHA200 headphone amplifier from McIntosh is designed for people who want the best source to drive their headphones. The McIntosh MHA200 is fitted with deluxe valves and has a raft of ...

Audio guru Steve Williams sent a link to Pete Millett's audio website. Millett designed the HA-1 and HA-2 vacuum tube headphone amps a while back. He describes himself as: “A lifetime electronics geek ...

Even without that striking logo, audio gear from McIntosh Labs has a look all its own, and one that's sure to stand out in any living room setup. The latest addition to the company's high-end catalog ...