This is a snippet taken from the full review of the IdeaPad S940. You can read the entire review here.
As far as audio quality goes, the speakers on the IdeaPad S940 are actually kind of impressive. Lenovo includes Dolby Audio with the machine which gives the upward-firing speakers that flank the keyboard a boost. They’re clear, offer decent bass, and get pretty loud. To boost the volume, there are two speaker grilles on the left and right sides of the bottom of the laptop. It certainly won’t blow you away, but the audio performance on the S940 is good and should suffice anyone’s laptop speaker needs.
And like I said, there’s a headphone jack, so you can always use your own set of speakers or high-end cans.