Bro as posted in your first post 6x9 can be installed in the front door but they are not recommended as the doors cannot take that load plus the vibrations created by the 6x9 are quite to make the whole door rattle.
Also the 6x9 are free air and not to be mounted in a door.
Get good 6.5 inch components they produce good bass when tuned properly. Also if you have more tunning option like TA in HU or Phase shift in amp you can get very good upfront bass.
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