FIG. 1 is a perspective view of a power amplifier;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a perspective view of another embodiment of the present invention; and,

FIG. 8 is a side elevational view of the embodiment shown in FIG. 7.

The broken lines throughout the drawing figures are included for the purpose of illustrating portions of the amplifier that form no part of the claimed design.