Having built a number of vacuum tube output transformer-less (OTL) amplifiers in recent years, it seemed as though it might be a good idea to try combining older with newer technology and using both ...

Ex-movie theater projectionist Steve Guttenberg has also worked as a high-end audio salesman, and as a record producer. Steve reviewed audio products for CNET and worked as a freelance writer for ...

Superb Design and Build Quality Help VX PP-KT88/C and VX SE-KT88/C Amps Deliver Dynamic, Crystal-Clear, Emotionally Engaging Audio Koetsu USA, the U.S. distribution arm of the world-renowned Japanese ...

SōLIS, an audio brand that has been around for four decades, is constantly evolving. Many of its current offerings pair with Google Home and Chromecast devices and it made a nice showing at CES with ...

Prior to Bell Labs’ first working transistor in 1947, which ushered in the advent of semiconductor technology and the computer age, every long-distance telephone call, radio and television broadcast, ...

The circuit uses the functionality of vacuum tubes to create a stereo amplifier that may be used to amply signals coming from different sources such as CD or mp3 players. In dealing with this circuit, ...

It was a cold January Saturday night in Chicago and we had big plans. Buddy Guy’s Legends bar was packed. We setup directly under one of the PA speakers less than 15′ from the stage. Time to celebrate ...

Japanese designer Koichi Futatsumata, founder of Case-Real studio, has designed a vacuum tube amplifier for electronics manufacturer Elekit. Elekit traditionally manufacture affordable, high-end audio ...

The artisans of hi-fi, McIntosh Labs, has just unveiled the new MHA200 Vacuum Tube Headphone Amplifier. Made for discerning headphone/home audio enthusiasts, this new amp features a pair of 12AT7 and ...

If you asked [Hans_Daniel] what he learned by building a tube audio amplifier with a dozen tubes that he found, the answer might just be, “don’t wind your own transformers.” We were impressed, though, ...