Loudspeaker

FIG. 1 is a front perspective view of a loudspeaker showing the new design; FIG. 2 is a rear perspective view thereof; FIG. 3 is a front view thereof; FIG. 4 is a side view thereof FIG. 5 is an opposite side view thereof; FIG. 6 is top view thereof: FIG. 7 is a bottom view thereof; and, FIG. 8 is rear view thereof. The broken lines and unshaded areas in the figures illustrate portions of the design that form no part of the claimed design.