Cayin’s German distributor has this week announced the RU9, a portable DAC and headphone amplifier designed for smartphones, ...

Schiit Asgard X headphone amp/DAC brings flagship Mjolnir tech, new Continuity A output, and Mesh DAC with Forkbeard app for under $550.

Abstract: A millimeter-wave power amplifier based on a coaxial-waveguide power-combining circuit is presented in this paper. A coaxial stepped impedance transformer is used to provide an impedance ...

You don’t need to spend a lot of money to get pristine audio quality, as this teardown shows…especially with a killer limited ...

for multiwavelength amplification and optical signal processing in a semiconductor optical amplifier (SOA) by using holding beam effect. The effect is used in SOA gain region at power level well below ...