
Since starting out in 2007, FiiO has been moving carefully but determinedly up-market - but without ignoring the entry level where it established its reputation in the first place. ‘Up-market’ where desktop-friendly headphone amplifiers/digital-to-analogue converters are concerned means this: the K9 Pro ESS.
Its specification is extensive, its functionality and compatibility wide-ranging, and its build quality gives every impression of being good enough to survive even quite sizable detonations. But is it any good? That's where this FiiO K9 Pro ESS review comes into play...