Logitech’s S315i is a streamlined and attractive portable speaker system. The smoothly curved unit is about the size of a paperback book and a mere 1.5 inches thick. It’s light and compact enough to slip easily into a backpack when you’re travelling.
You can run the S315i off the included power adapter, but its big selling point is that it has a built-in rechargeable battery that saves you having to keep buying batteries for portable use. The battery lasts for about 10 hours normally, and there’s a power-saving mode that can almost double that to 20 hours.
A speaker this size obviously won’t be powerful enough to replace a larger hi-fi in your front room, but the volume is more than adequate for listening to music at work or in your bedroom.
Higher frequencies are clear and strong, although a little distortion does creep in when you turn the volume all the way up. The bass is also stronger than we’d expected from such a small set of speakers. However, the power-saving mode works by reducing the bass dramatically, so you do have to sacrifice a bit of sound quality to extend the battery life.
Macworld’s buying advice
The S315i is a well-designed portable speaker system—light and compact, with good battery life and sound quality. However, a speaker costing this much really ought to include a remote control, and that omission leaves the S315i looking a little overpriced.