You have to remove the door panel. After you will see the speaker which sits in 4 screws. Remove the screws disconnect the speaker and in the reverse order for your new speaker. Keep in mind, whatever new speakers you get, the stock amp on this vehicle has a low pass filter to the door speakers (and a high pass filter to the dash) so they won't deliver any highs.
How do you remove front door Panel on Hyundai Excel 1999 to Rplace front door SPEAKER'S
How do you remove door speakers on a 1999 chevy tahoe
Remove the inner door panel.See link below.
Maybe you blew them out?
Buy a new hub
6.5" speakers in the front
you have to remove the door panel to get to the speakes ok any more cuestions here is my email zk_edgar@hotmail.com
4"
The front speakers are 6 1/2" and rear speakers are 5 1/4"
Should be 6.5" speakers in the front doors and 6"x9" in the back dash
The rear speakers on a 1999 Buick Regal are removed by accessing the speakers from the trunk. The mounting bolts and then removed, the wires disconnected, and the speakers lowered from their mounts.
According to Crutchfield the front speakers on a 1999 Tiburon are 6 and 3/4 inches.