I'm actually pulling the 5th? trashed set out of my Snow at the moment, so I shall get some pics up for you ASAP.

There's actually very little to them inside the enclosure, as most of it's bulk is purely for acoustic considerations.

Theyre theoretically supposed to be a sealed unit, and presumably as far as Apple is concerned, a non- servicable component like the Yoyo adaptors, however the two halves of the shell are actually just glued together in the factory with a non-hardening silicone-like compound and a single screw down the middle... Remove the screw and with some careful prying it is relatively easy to get it apart, revealing what from memory is quite a basic loudspeaker assembly.

I actually had a set I had dismantled already but cant remember where I put them.