Loudspeaker

FIG. 1 is a perspective view of a loudspeaker in accordance with our design; FIG. 2 is a top plan view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a right side elevational view thereof; FIG. 5 is a left side elevational view thereof; FIG. 6 is a rear elevational view thereof; and, FIG. 7 is a bottom plan view thereof. The broken lines represent portions of the loudspeaker that form no part of the claimed design.