A regular Hack A Day reader sent in a tip about an LM386 stero amplifier with digital volume control. The resulting build is very professional and could easily be adapted into a slick iPod dock build.

Volume control is a simple premise on Android phones ... It also works as an amplifier and an equalizer. The user interface looks neat, it’s easy to find settings, and it’s easy to configure.

At $1,499, the Rotel DX-5 is a compact sized 25-watt per channel stereo integrated amplifier with Bluetooth, HDMI-ARC and ...

[Simon] wrote in to tell us about a headphone tube amp that he just built ... design adds an on board regulated power supply and a volume control for the input. Effort was made to keep the ...