The ornamental design for an automotivespeakerbox with ampifier, as shown and described.
FIG. 1 is a perspective view of the automotive speaker box with ampifier
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a back side view of FIG. 1;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a bottom view of FIG. 1;
FIG. 6 is a right side view of FIG. 1; and,
FIG. 7 is a left side view of FIG. 1.
The broken lines in the drawings are for the purpose of illustrating portions of the automotive speaker box with ampifier that form no part of the claimed design.