Forbes contributors publish independent expert analyses and insights. Technology journalist specializing in audio, computing and Apple Macs. South Korean award-winning audio brand Astell&Kern has ...

If you own some of the very best headphones, you've probably encountered a really frustrating problem with mobile audio: many devices just aren't powerful enough to drive high quality headphones or ...

Astell&Kern today introduced two new headphone amplifiers, the ACRO CA1000T ($2,229) carriable headphone amp and the PA10 ($599) portable headphone amp. In addition, the HC3 Dongle DAC ($229) we ...

If you already know about class A, B, and AB, they are all linear amplifiers with constant gain where the audio is fed to the base of a transistor. The latest class D audio amplifier is switch type ...