QUOTE(kianwee @ Jul 21 2009, 02:11 PM)
During renovation I consulted the contractor about the rattling issue, he recommended me to put more aluminum backbone structure - every 30cm apart. It was really a hectic job for them as they need to screw hundreds of screw to secure the plaster tightly.

QUOTE(pierreye @ Jul 21 2009, 03:01 PM)
What I do is ask the contractor to use the thicker frame and use rubbermat for each joint ot reduce metal vibration. Also put the rockwool on top of the plaster ceiling to act as broadband sound trap.
Unfortunately I wasn't aware of the plaster ceiling issues early on, otherwise I would taken your suggestions and do them. Anyway, I'm still able to access parts of the ceiling and try to dampen it as much as I can.
Anyway, on to something more interesting... I recently went to the cargo terminal to pick up something new. I wonder what it could be...??

Oh look, it's a subwoofer (shown next to my 12Q).

Any guesses what it could be?
Hint: it's sealed.