Sony's ear cushions clip into (and out of) place—no fancy magnets here. We rather liked the magnets; clips can get brittle and break.
Underneath, we find a free-floating foam liner. Under the foam liner, the drivers sit encased in plastic cages.
The drivers will have to wait though. Four (marked and visually distinct!) screws inside each ear cup hold down the exterior panels. So instead of digging deeper, we flip to side B.