So far, so good, but predictably the one area the Pure-Fi Mobile is less impressive is in sound quality. In some respects, for a small set, it's quite impressive; it does, for example, reach some astonishing volumes given its size - handy when outdoors.
Yet, most of the usual issues still apply. Bass is mostly lacking, with only hint of the true depth portrayed, thus creating a relatively top heavy sound. In fact, in this case, where percussion is more audible than bass, it still sounds somewhat compressed compared to the mid-range.
Some of this is moot since you wouldn't expect high fidelity sound from such a small set, but it's all relevant depending on what music you listen to. Acoustic and Vocal-centric tunes are produced very well and pop music shouldn't pose too great a problem, but heavy rock and RnB/Hip-Hop isn't so good. A point must be made of the stereo sound expander, though, as it does a great job of creating a wider sound from a narrow point.
Call quality is pretty solid, too. It's not going to pick you up from the other side of the room, but it works perfectly well at a reasonable distance and having a civilised conversation is no problem at all.
Our only other issue with the Logitech Pure-Fi Mobile is the price. Online retailers have it listed, but not in stock, for around £75 - a fair amount less than the £100 MSRP. In either case, though, this is quite an expensive bit of technology even considering its wide and very well implemented feature set.
Indeed, one can't help but feel that the feature set has priced the Pure-Fi Mobile into a niche. While the call control features are a nice touch, it's not something the world of portable speakers has been missing all this time. One would quite happily live without the array microphones, pay a little less and enjoy the musical abilities all the more. Still, if you can swallow the cost, this is the most complete mobile speaker set we've seen and delivers competently on the features it offers.
A very well featured and designed mobile speaker set, the Logitech Pure-Fi Mobile is let down by a price that's bound to prove a little too rich for many, while the sound quality is decidedly average.