In a previous apartment (paper thin walls, I could hear the adjoining renter yelling at her teenage daughter and the dog upstairs playing) (lived there for 5 years) me and my downstairs neighbor had full surround setups with big subs. Between us there was only two instances when he told me to turn in down and I had approach him only on one occasion.
If no one was home, we would shake the structure with aplomb. One time I had someone from the next building over come and tell me to turn it down since his wife was having a migraine and my bass was bothering her!
We were keenly aware of other neighbors presence in the building and we never broke quiet hour rules.
Moral of story, community living is a give and take. Enjoy your setup, but be reasonable, and you'll be fine.
