it may depend on if you have a center console subwoofer or not, if no subwoofer then you may have 6X9's in the front doors as those would provide the bass sound instead,
what is the goal here? you can always just pull the door panel off and look, you can always get adapters to change the speaker size & type as well or if need be make a cut.
if you are looking at changing anything keep in mind the various functions bluetooth, rear camera backup tone, vehicle warning tones, etc are routed thru different speakers in the system, bass sound may be routed separately as well as noted by console sub/door speakers, if you want to change any of that you will need a multi channel amp and adapters.