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The ornamental design for a power amplifier, as shown and described. |
FIG. 1 is a front perspective view of a power amplifier showing my new design;
FIG. 2 is a front view in elevation of the power amplifier of FIG. 1;
FIG. 3 is a rear view in elevation, on an enlarged scale, of the power amplifier of FIG. 1;
FIG. 4 is a side view in elevation of the power amplifier of FIG. 1 as seen from the left-hand side of FIG. 1;
FIG. 5 is a side view in elevation of the power amplifier of FIG. 1 as seen from the right-hand side of FIG. 1;
FIG. 6 is a top plan view of the power amplifier of FIG. 1; and,
FIG. 7 is a bottom view of the power amplifier of FIG. 1.
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