CML Micro’s single- and two-stage GaAs power amplifiers target a range of dual-cell lithium battery-powered wireless devices.

There are a small handful of old tubes that need an impressively low voltage to work, though, and [J.G.] has put a few of them to work in this battery-powered audio tube amplifier. The key to the ...

Alternatively, headphone amps can be more substantial hi-fi components designed to integrate into a fully-fledged system to enhance private listening at home. Our how to choose the best headphone amp ...