I have 989's.
To remove the socks, tap the top cover to the left using palm of hand holding the speaker with other hand. Top cover then lifts off screw heads.
Sock is just pressed onto Velcro at top.
Lay speaker down on it's back (first remove brace in your case) onto a table or bench.
Remove steel base plate, numerous small pozi screws, lower gently as there is an earth tag attached !!
The base is attached to the panel by long threaded studs, lowering the nuts to the end of the thread allows sufficient room to lower the base and remove the socks at the bottom.
These instructions are for the 989's your 2805's may vary, though they share the same panels.