We claim the ornamental design for a soft cover speaker casing, as shown and described.
FIG. 1 is a front view of a soft cover speaker casing.
FIG. 2 is a right side view of the soft cover speaker casing of FIG. 1.
FIG. 3 is a left side view of the soft cover speaker casing of FIG. 1
FIG. 4 is a top right rear perspective view of the soft cover speaker casing of FIG. 1.
FIG. 5 is a bottom right rear perspective view of the soft cover speaker casing of FIG. 1.
FIG. 6 a bottom left rear perspective view of the soft cover speaker casing of FIG. 1.
FIG. 7 is a front perspective view of the soft cover speaker casing of FIG. 1 with the rear panel in an open position; and,
FIG. 8 is rear view of the soft cover speaker casing of FIG. 1, with the rear panel in an open position.
The broken lines in the Figures are included for the purpose of illustration and form no part of the claimed design. The broken lines showing a zipper and zipper pull tabs illustrate environmental structure and form no part of the claimed design.