ND 555 is the first network player from Naim Audio to earn 500 series status. It is, in short, the very best network audio player that Naim knows how to make. As such, it’s a typical piece of holistic, evolutionary Naim engineering: it builds on past developments, it pays as much attention to mechanical design as electrical design (particularly in combating the effects of vibration), and it takes trouble over important minutiae that other brands routinely ignore. It is not festooned with snappily-named ‘revolutionary’ technologies; rather, although radical in traditional Naim fashion, it is a considered, thoroughgoing and painstaking piece of engineering - one for which the final arbiter in all design decisions has been sound quality.