Smartphones with stereo speakers

Stereo

— this section usually indicates stereo sound support — the ability to play full stereo sound through the phone's own speakers, without external audio devices. For this task, there must be at least two speakers. This complicates the design and increases its cost, but positively affects the quality: the sound becomes more expressive and detailed compared to using a single speaker — it has a surround effect and often higher volume. Note that for advanced implementations of such sound, the name of the audio brand involved in tuning the device's speakers may additionally be specified: stereo sound by AKG, JBL, Harman Kardon, etc.