The ornamental design for a speakerenclosure, as shown and described.
FIG. 1 is a perspective view of a speaker enclosure;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is an elevation view thereof from the right side;
FIG. 5 is an elevation view thereof from the left side;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of the speaker enclosure is for the purpose of illustrating portions of the speaker enclosure and forms no part of the claimed design.