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 ...

Normally when we hear of a Champ guitar amp, we think of a sweet-sounding rig that puts out 6 Watts through an 8-inch speaker. [John Chambers] of Champ Electronics wanted to build a true champion for ...

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 ...

The circuit was designed to create a power amplifier circuit that will utilize E80CC and EL34 vacuum tubes for better results while providing 35 Watts of power. E80CC – a special quality double triode ...

Always hankered after a retro-chic McIntosh valve preamplifier and compatible power amp to match? Feast your eyes on this neat new duo. Despite style cues that nod to the firm's 1950s and 1960s design ...

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 ...

While it's true that we've seen some gorgeous examples of modern amplification at Gizmag over the years, there's still something very pleasing to the eye about those that proudly display their tube ...

Any experience with something like this? The power seems pretty weak, so I'm not sure how big the speakers it can drive could be. Miniwatt N3 A minimalist integrated amplifier with one pair of RCA ...

Do you own high impedance dynamic driver headphones? The Drop+Xduoo TA-84 OTL Headphone Amplifier is one sweet bargain at only $349 and it even includes a DAC. Products like the Drop+Xduoo TA-84 OTL ...

This diagram shows the standard layout of transistors in cell phone power amplifiers, at left, and a new highly efficient amplifier design, at right. The new design could help make possible ...

The Feliks Audio Echo Vibe is a $1,095 OTL tube headphone amp from Poland that runs hot, sounds lush, and proves you don’t need 2 watts to melt your face off. Feliks Audio positions the Echo Vibe as ...