How do you take out a dash board speaker in a 1991 Cadillac Deville?

Answer 1

You must remove the upper dash to access the speakers - the grilles are attached from below using nuts. To remove the upper dash you remove the screws at the defrost vent, pop out the A/C vents on the dash face (easily comes off with a flat head screwdriver) to access screws behind them, and two screws inside the glove box. 9 screws total. There is a hose and one wire clip as well.

Either replace the factory grill with a custom made grill for deeper speakers or buy shallow mount 4x6 with an adapter plate for a stock look.