My audio related projects are divided by type. In the Speaker section there are two uncommon systems: Auri, a double chamber reflex (published on audioXpress magazine), and a dipole+subwoofer speaker. Both are supported with measurement made by using Speaker Workshop and a detailed building instruction.
Another project is an oversampling DAC, not too expensive and very well sounding. It also appeared on audioXpress.
Two power amplifiers are described as well: a powerful class D and a clever use of the LM3886 power chip.
In the next future I will add some preamplifiers and an audio measurement interface (JIG).