I recently purchased a used Audio-gd Reference 19 DAC (PCM1704UK DAC Chips) which I'm feeding via digital coax from a Sony UHD Blu-Ray player. Every time a nearby component switches on (freezer motor, fridge motor, even a CD being read by the disc player) a loud "pop" comes out of my speakers...

I can say from experience that Meier Audio offers some of the best value headphone amplifiers and DACs in the game. Think of them as something akin to a European version of Schiit. Enclosures are modest and marketing costs minimal. The attraction of these amps lies in their sound and design...