Bass (low bass) in an adjacent apartment can sound HUGE compared to your room. And, in your room, you could certainly have conversations while your bass was pumping out without noticing it. This happened to me once when I bought my first Velodyne back in 1996. I could barely hear the bass (it was probably balanced in room) but my neighbor said it was extremely boomy, and as others have said recommended I elevate it off the floor. Ever since then I have done my best to NOT live in an apartment.
Apartment Drama
Hi- I recently moved from my house to a 2nd floor apt with 1 apt on each side and 1 below. 3pm today I turned my stereo on for the 1st time. Low volume IMO. Hard to describe but no problem having a conversation without even raising my voice. within 10 minutes my neighbor knocked on my door acting irratated demanding I turn the volume down. WTF? Now what. Do I have any rights or do I have to obey this jerk?