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 ...

In a balanced op-amp circuit, the op-amp inputs see equal impedances looking into the circuit. Balanced circuits provide better performance by cancelling some input errors and have a simple R F /R I ...

Op amps excel at providing many useful and clever solutions to routine or complicated circuit functions. A summing circuit is a perfect example. A summing circuit is typically used in applications ...

A conventional tube amplifier has a circuit whose fundamentals were well in place around a hundred years ago, so there are few surprises to be found in building one today. Nevertheless, building one ...

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 ...

Hand-crafted in New Jersey, the all-tube stereo VPI 299D integrated amp looks, feels and sounds like a winner to the Audiophiliac! Ex-movie theater projectionist Steve Guttenberg has also worked as a ...

In the first part of this two-part blog post I talked about one of my first “up-close-and-personal” experiences with tube-based audio electronics – a home-built hybrid solid-state/tube electrostatic ...

Packing three vintage Marshall-inspired modes plus a preamp enhancer inspired by the AC/DC guitarist's not-so-secret secret sauce, the Heatseeker is a formidable drive and tone shaper for rock guitar ...

Crazy Tube Circuits has done it again, and by again we mean it has released a fully featured amp-style overdrive pedal that pairs a classic amp drive voicing with a classic pedal – on this occasion a ...

If you want to replicate the music of your favorite musicians, you will need to know the pedal effect devices they use and the circuitry within them. Furthermore, if you want to design new pedal ...

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 ...