CAUTION : the tweeter magnet is VERY powerful.
 
It will suck in anything metallic coming close to it.
So, make sure you have a firm hold on tools and screws when you are working close to the unit.
Failure to do so may result in the destruction of the Beryllium tweeter dome.

Remove the 4 front screws with a 2.5mm Hex key.
Pull out the units from the cabinet.
Loosen the 2 set screws holding the wires with a small flat screwdriver.