Five years ago I began using a music server and DAC in lieu of a compact disc player, thus starting my journey into digital audio streaming. Keeping in mind that music servers are in fact computers, my main motivation came from discovering Mojo Audio, a company which at the time modified Mac mini computers to be serious music servers by (among other changes) replacing their internal power supplies with Mojo's own high-end external linear power supplies. Over the last 5 years I have kept the Mac mini as my reference, only upgrading it by changing player software from JRiver to the revolutionary Roon Labs, subscribing to Tidal, and swapping out its power supply by a series of better ones—all made by Mojo Audio, too; currently I use their Illuminati V2—it is a ‘choke input’ power supply and is my favorite [my review of the V1 may be found here].
But five years is a long time in the digital world. Much has happened. I did see and listen to various new alternatives including NUCs (‘Next Unit of Computing’ mini-computers) which were smaller, lighter, typically less expensive, and more energy efficient than a Mac mini. Like a Mac mini, a NUC is ‘headless’, e.g., you do not need to connect a monitor or keyboard to it except for setting it up with software and such. Once set up, controlling music play is accomplished by using a wirelessly connected app on a mobile device or tablet. I also checked out serious commercial high-end music servers, and I have been impressed at times. Suffice to say it has become clear that the Mac mini is on the way out; there are quite a number of alternatives.