[Simon] wrote in to tell us about a headphone tube amp that he just built. It is based on schematics at diyaudioprojects.com that were actually featured on Hackaday in the past. [Simon’s ...

[Frank Olson Music] took apart an old pair of headphones and salvaged the speakers ... cutting some basswood planks into pieces of the amp before gluing them together — sizing it to be ...

Transform your Raspberry Pi into a high-fidelity music player with the Pimoroni Pirate Audio Headphone Amp, with a 24-bit DAC ...