Don't insert your tool deeper than 1 cm (a little less than half an inch) near the front of the speaker cutouts to avoid damaging the speakers.

Insert the flat end of your spudger into the front of the cutout in the right side of the frame.

Slide your spudger toward the back of the cutout and pry up to release the two right-side clips.

Repeat for the left-side speaker cutout to release the two left-side clips.