Loudspeaker

FIG. 1 is a front perspective view of a loudspeaker showing our new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a left-side view thereof; FIG. 5 is a right-side view thereof; FIG. 6 is a top view thereof; and, FIG. 7 is a bottom view thereof. The evenly-dashed broken lines in the figures depict portions of the loudspeaker that form no part of the claimed design.