Portable audio device

FIG. 1 is a top, front, left perspective view of a portable audio device;

FIG. 2 is a back, bottom, right perspective view thereof;

FIG. 3 is a top-view thereof;

FIG. 4 is a bottom-view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a front-side view thereof; and,

FIG. 8 is a back-side view thereof.

Within the drawings, the dashed lines show unclaimed portions of the claimed design. None of the broken lines form part of the claimed design.