The picture you just clicked on is actually a built in motherboard speaker. The picture above shows
what a case speaker looks like. The actual case speaker is hidden behind the front panel. Both are
generally only used for computer warning beeps or an occasional rare generic sound from a program.
Warning beeps are usually heard during startup if a keyboard is not connected, memory has went bad,
or something like that. Otherwise, you seldom ever hear the case speaker. Some sound cards allow
you to bypass the case speaker altogether and play the warning beeps or other sounds intended for
the case speaker on your regular "good" speakers, but there is nothing wrong with using the case
speaker to play these sounds.