Raspberry Pi’s combination of small size, versatility, and affordability has led to a number of interesting projects. One of the most popular uses for the Raspberry Pi computer is turning it into a full functioning media player. The Raspberry Pi Tube Amp is an add-on to you favorite DIY tech project that is compatible with all 40-pin versions of the Pi, and adds a 24-bit DAC, single 12AU7 tube gain stage, and a solid state Class A output that can drive headphones ranging 32 to 300 Ohms with ease and fidelity, or act as a preamp for your stereo system. All in all, the hybrid vacuum tube-amp is an awesome add-on that brings warm, vintage analog tones to your Raspberry Pi.