The ornamental design for a combinedholder and strap for securing a speaker, as shown and described.
FIG. 1 is a rear perspective view of the combined holder and strap for securing a speaker, in an assembled position with a speaker, showing my new design;
FIG. 2 is a rear perspective view without the speaker of FIG. 1;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a right side view of FIG. 2;
FIG. 5 is a rear view of FIG. 2;
FIG. 6 is a front view of FIG. 2;
FIG. 7 is a top view of FIG. 2;
FIG. 8 is a bottom view of FIG. 2;
FIG. 9 is a rear exploded view of FIG. 2; and,
FIG. 10 is a front exploded view of FIG. 2.
The broken lines showing a speaker in FIG. 1 are for the purposes of illustrating environmental structure and form no part of the claimed design. All other broken lines depict portions of the combined holder and strap for securing a speaker that form no part of the claimed design.