Yeah, Hyundai cheated by counting the tweeters in their '6 speakers' where in actual fact they meant 2 component speakers and 2 single cone speakers. As Paolo5 stated, they are located in the triangular trim next to the front passenger and driver side window.
Tad harsh on Hyundai I dare say?
All manufacturer's would class tweets as speakers, in all fairness, they are a speaker.

Just a speaker designed to reproduce the higher frequency of the song, same way a sub woofer would be classed as a speaker, however reproduces the lower frequencies