Loudspeaker

FIG. 1 is a front, top, right perspective view of a loudspeaker according to the present invention; FIG. 2 is a rear, top, right perspective view thereof; FIG. 3 is a right side elevation view thereof; FIG. 4 is a left side elevation view thereof; FIG. 5 is a front elevation view thereof; FIG. 6 is a rear elevation view thereof; FIG. 7 is a top plan view thereof; and, FIG. 8 is a bottom view thereof. The broken lines illustrate portions of the loudspeaker that form no part of the claimed design.