With the ear cushion removed, you will have access to the first 4 screws holding the earcup together.

Using a Phillips #000 screwdriver, remove all 4 of these screws.

Removing the piece of foam in the middle of the earcup will reveal the main driver, as well as 4 more screws.

Using a Phillips #000 screwdriver, remove the last four screws within the interior of the earcup.