Hi Slayer, knowing how some landlords are, please try and inspect the installation/or get an electrician to do it for you.
Firstly, from personal experience, the frames in many homes are widely spaced. And then, most false ceilings feature poor quality material.
You can switch off the fan, get up on a stool and try tapping at different places that are feasible for your placement to find if a frame runs through there.
Otherwise, you could simply get an electrician to check if:
1. If there is a good quality frame,
2. do the frames run along your desired spots, and
3. will the frame (and the ceiling board) withstand the drilling, and hold speaker weight.
If the frame good quality, is in your alignment and the ceiling board all three are good quality, a 2-kg speaker with a 4-screw mount will be doable.
Even if one condition is not satisfied, please abandon the idea. Really sorry to be a wet blanket, but many Bombay landlords are mostly just looking at ways to see how not to return the security deposit
Alternatively, buy *cheap* in-ceiling speakers, speak to your landlord and tell them you will be installing them and *leaving* them in place when you vacate, and that they could keep them. They might just agree and be happy too...
