Small but great! The sound is incredibly stable for these small SoundLink. No creaking, no crumbs, clear bass, the mids are good, the highs could be clearer, but can be personalized with an equalizer on the iPhone or iPod regulate something. Where the wail is here on very high level, for such a small box and provide many speakers, even larger, much in the shadows. So to my mind the sound of Bose is very pleasant for others, as you read here in the forums, is too pronounced for some of the bass, for others is the bass almost nonexistent, huh! Anyway, the bass is to be settled in the pleasant central area, it is not exaggerated bass, as some think, but really a pleasant bass. Something bass needs a good sound and gives it the necessary depth, otherwise it sounds more like portable radio. For powerful bass I find very unpleasant because the bass can still be as clear, such as in the 2.1 Logitech, some like this bass, I'm mad at these vibrations. Sonically is for me so this Bose absolutely fine and you can use super in many rooms or even take to presentations, because other trainers are usually equipped much worse