FIG. 1 is a front-side perspective view of a hi-fi ribbon microphone casing showing our new design; FIG. 2 is a left-side view thereof; FIG. 3 is a right-side view thereof; FIG. 4 is another front-side perspective view thereof; FIG. 5 is a rear-side perspective view thereof; FIG. 6 is a top-side perspective view thereof; and, FIG. 7 is a bottom-side perspective view thereof.