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 ...

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 ...

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 ...

Operational amplifiers (commonly called op amps) are a ubiquitous building block for designing electronic circuits. Today, these devices are fabricated as small integrated circuits, but the concept ...

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 ...

There’s a mystique among both audiophiles and musicians about vacuum technology, thus having a tube amp still carries a bit of a cachet. New ones can be bought for eye-watering prices and old ones can ...

CTC soups up its Dumble/K-style amp-in-a-box drive with some super rare germanium. It's limited edition, on until it's gone, but the original Unobtanium will remain on the menu When you purchase ...

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 ...

Dynaco hasn’t made equipment in decades. Yet it’s still a name most audiophiles know off-hand. That’s because the American manufacturer left an indelible legacy on the world of hi-fi, thanks in large ...

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 ...