FIG. 1 is a front, side, perspective view of an expandable stereo speaker in an opened condition showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a side view thereof;
FIG. 7 is an opposite side view thereof;
FIG. 8 is a front, side, perspective view thereof in a closed condition;
FIG. 9 is a front view thereof;
FIG. 10 is a rear view thereof;
FIG. 11 is a side view thereof; and,
FIG. 12 is an opposite side view thereof.
The broken lines in the drawings illustrate environmental material that forms no part of the claimed design.