Step 4: Removing cone speaker(s) and gaining access to the speaker cabinet interior
Once the molded plastic speaker grille is completely loosened, lift it out of the way, but make a special effort to keep the glued areas free of dirt and dust.
In my speaker model, the speaker to the horn was attached to the molded plastic speaker grille and had to be removed (two phillips-head screws).
One cone speaker was then removed, by removing four phillips-head screws, and gently pried off with the sharp, broad-face wood chisel, until it released from a foam gasket-seal. Again, be sure not to damage this foam seal as it prevents vibration, as well as provides a sound-tight seal for the speaker enclosure. The molded plastic speaker grille and speaker cabinet are carefully designed to allow sound to escape in a controlled and restricted manner, to maximize sound. And the foam seals/gaskets ensure this.