The ornamental design for the speaker for automobile, as shown and described.
FIG. 1 is a perspective view of a speaker for automobile showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a front view showing a state that the grille is removed.
The broken line showing of the speaker for automobile is included for the purpose of illustrating portions of the speaker for automobile and forms no part of the claimed design.