[Simon] wrote in to tell us about a headphone tube amp that he just built. It is based on schematics at diyaudioprojects.com that were actually featured on Hackaday in the past. [Simon’s] design adds ...

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 ...

The problem with tube based audio is that it has so often been hijacked by people for whom the bragging rights of having a tube amplifier outweigh the benefits, or the sheer fun of building the thing.

In recent years, Class D amplifiers have made inroads into audio consumer electronics, automotive, and portable audio world with the allure of a smaller implementation area and higher efficiency. This ...

Op amps played a critical role in knocking out German cruise missiles in WWII. Scientists at Bell Labs came up with a spiffy, high-gain, differencing amplifier. Andy’s still threatening to run SPICE ...

The Apos x Community Gremlin is a compact fully balanced Class A hybrid amp that delivers impressive warmth, tube rolling flexibility, and big performance for the price. If you’ve spent any time ...