Feliks Audio is one of the few boutique brands from Poland making serious noise in the Head-Fi scene. They specialize in handcrafted tube amplifiers for both headphones and speakers, all built in ...

The Dynaco ST-70 is one of the most popular tube amplifiers ever. First released in 1959, it's still sought after by hi-fi enthusiasts today.

At Oak Ridge National Laboratory in Tennessee, a half-dozen workers are making what appear to be gray billiard balls.

EarthQuaker Devices has launched an analogue guitar amp simulator that can be used as a preamp on your pedalboard, or as a headphone amplifier for silent practice, and the best part? It’s so simple to ...

In this paper, we use power margin as a figure of merit for evaluating the performance of TWT amplifiers used in multi-level digital communications applications. Power margin is better at predicting ...

A high-power uniform helix traveling-wave tube amplifier (TWT) with T-shaped and half-moon metallic vanes is presented. By loading two sections of concentrated attenuator with a sever, the simulation ...

Stereo amplification can be built into speakers themselves (we call those powered or active speakers), delivered as a two-box pre/power amplifier pairing where the necessary preamp and power amp ...