Okay, this is one of three rears (the centre rear to be precise). As you can see, quite small with neat drivers. Not much on the low end but great everywhere else. Very impressed.

A quick inspection of the back shows you some Wacky Brackets (I should probably flip the speakers upside down for proper weight distribution). Each speaker is roughly 3kg so they've gotta hold a bit and so far none of them have moved :) I also spent hours in the roof to get the cables neatly through the wall there.

And a small panoramic so you can see them all. Note we've left the old rears up (and yes, that's a terrible spot for the old surround right) so that when I move out, they can be used again.