Yeah, success - DAC10 Celeston speaker disassembled!
Thanks to Lloyd, who confirmed that the top plate was just glued in place, it was just a case of working away at the gap between the top and bottom sections with a small pry tool until the glue eventually gave way.
Lots of rust, dust and other debris to clear away and I can now unbolt the magnet and treat the rust:-
.
A bit worried about the voice coil which has seen better days although I'm still reading 3.4 Ohms across the speaker:-
Once it's all cleaned up I've no idea how I will re-centre the magnet in the voice coil when I re-attach the suspension. In a '
normal' speaker I would use thin plastic or paper shims for this job but don't see any way of doing that with this inverted cone speaker??
Here is the pry tool I used to separate the top and bottom sections:-
