Building and learning about electronics remains one of my favorite pastimes. When I can connect it to music, so much the better.
I’m building a new preamp – this one with a microcontroller and a pile of digital hardware to provide remote control and switching. The best place for this kind of project is www.diyaudio.com – a huge set of forums for people involved in building their own equipment. I’ve been involved in the forum for almost ten years, building speakers and amplifiers.