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 ...

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 ...

1. Is Amplifier Weight an Indicator of Robust Amplifier Design? You have to find out if the amplifier is a Class A/B analog amp or a Class D digital amplifier before you can generalize about weight ...

Like most of us during what advertisers like to call “this difficult time,” I was compelled to spend a fair amount of it “working” from home. Truth be told, I hadn’t worked so hard in years. My wife ...

The $15,000 McIntosh MC3500 MK II Vacuum Tube Power Amplifier goes back to the future and it is one mighty beast. The industrial design is definitely a mixture of old and new and it’s not something ...

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 ...

In this video, I take a deep dive into the Cayin HA-6A Mk2, a flagship tube headphone amplifier that promises to bridge the gap between delicate IEMs and power-hungry planar magnetic headphones. While ...