The ornamental design for a loudspeakersystem, as shown and described.
FIG. 1 is a perspective view of a loudspeaker system showing the new design in an assembled state;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a side elevational view thereof; and,
FIG. 7 is an opposite side elevational view thereof.
The broken lines immediately adjacent the shaded areas represent bounds of the claimed design, while all other broken lines are directed to environment and are for illustrative purposes only. All broken lines and unshaded areas form no part of the claimed design. The shading on the loudspeaker is provided merely to represent contours of the design and does not connote the character of the surfaces such as any specific texture, material, gloss, translucence, transparency, surface treatment, or surface decoration.