Can My Subwoofers Damage My Home

A lot depends on the material used to cover the wall studs and ceiling joists.

If drywall was used it would then depend on whether the drywall was hung using nails
or screws, and whether the drywall was glued to the wall studs and ceiling joists.

I have seen in the case where only drywall nails were used, no glue, the drywall compound that was used to cover the recessed head of the nail popped loose exposing the nail head......

As for plaster and lath I suppose the vibration could cause the white coat to crack and in the event the bond of the white coat to the brown coat was poor there could be some loosening damage of the white coat and subsequent flaking off.
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Dont have any issues with my neighbours as they are too far from my house. I am only worried when i watch movies, my floor and seats vibrate and wondering if it loosesn the nails of the structure in the long run. I dont watch movies at very loud voumes. at 70-75DBA for voice. But when actions sequences come it goes to 100-110 DBA. If i reduce the volume, the voices are not clear.

I would be careful if I were you. I live in a 110 yr old Victorian with plaster walls and plaster detail. Each of the three main rooms in the middle floor have a large ornate plaster "medallion" around the ceiling light fixture. My listening room used to be in the floor above (it is now on the main floor). Only the ceiling of the room directly below the then listening room (subwoofer) has suffered cracks in the plaster and the medallion almost fell off the ceiling. Coincidence?

Today I played Cowboys and Aliens, the source being a DirecTV HD-DVR. Our pair of Velodyne HGS-15s shook the room so violently I attenuated their level 6 dB with the SMS-1 to watch the movie in comfort. I assume such shaking must eventually loosen studs.

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