[atrueb]

Im not 100% sure, but I'm pretty sure that the base system does NOT have any tweeters. The base system only has round speakers in each door and big speakers under the front seats. Those round speaker grills in the doors do not have any logos or writing on them.
Harman Kardon however additionally has the little tweeter speakers infront of all the door handles. Furthermore the round speakers in the doors have a grill with Harman Kardon written on them. Hope this information helps.