So, here is the complete RH speaker assembly... for most purposes we'll say it's intact.



This one has simply had the complete intact membrane and motor unit break away from the outside of the basket...



This is a severely rotted one that has had the entire surround membrane disintegrate during operation...





This is one of the other speakers that i replaced in the past after it began to fail... there is a lengthy split in the membrane on the side adjacent to the sound port...



This is the screw that must be undone and silicone bead that must be parted to facilitate disassembly... this particular one was easy, didnt need to pry it apart at all, just pulled apart in my hands with minimal fuss, and no need to remove the sealant at all...





And here it is apart. The speaker is simply glued to the lower portion of the enclosure and can be carefully pried off with a screwdriver... note the presence of spade connectors. I've tried disconnecting them as an experiment but it seems the force required to get them off would destroy the speaker as theyre on quite tightly...







And here's the fairly basic innards of the speaker. Interestingly the motor unit is suspended over an internal magnet by the front membrane and voice coil leads alone, with no spiders. As an asde, I have also just realised the entire motor unit and membrane actually lift off the magnet... this could be handy. Note that the coil leads are particularly fragile and break easily off the coil...





So... there we have some food for thought. With some careful precision and ingenuity it could be possible to actually replace the surrounds, but more importantly it seems to be a piece of cake to disassemble the actual speaker to a point where a semi-decent surround could be easily repaired.