Remove the five screws securing the lower speaker:

One 2.8 mm standoff screw

Standoff screws are best removed using a dedicated standoff driver or driver bit.

In a pinch, a small flathead screwdriver will do the job—but use extra caution to ensure it doesn't slip and damage surrounding components.

One 2.3 mm standoff screw

One 2.3 mm Phillips screw

One 1.8 mm Phillips screw

One 1.6 mm Phillips screw