The ornamental design for the sounder base housing, substantially as shown and described.
FIG. 1 is a perspective view of a first embodiment of a sounder base housing in accordance with the present invention;
FIG. 2 is a top plan view of the sounder base housing of FIG. 1;
FIG. 3 is an elevational view from a side of the sounder base housing of FIG. 1 looking toward a first side thereof; and,
FIG. 4 is an elevational view from another side of the sounder base housing of FIG. 1 rotated 90 degrees.
The bottom views of the above-described embodiment has not been illustrated. They are unadorned and not part of the design. Further, certain elements of FIG. 1 and FIG. 2 have been shown in dashed-line format. Those elements shown in dashed-line are disclaimed and are not a part of the design.