I just ran into our neighbors who live under us. He asked me if I had a new system, as they have been hearing my music lately
I told him I had new speakers
He also asked me if I was measuring my room. It turns out my frequency sweeps were clearly audible in their whole apartment
He was really cool about it, and said it didn´t bother them; he even offered his help. It seems he knows a thing or two about accoustics.
Even though he was very friendly, I´ll probably keep the volume a bit lower when listening to Metal in the future. They rarely hear my classical music, and even when they do hear bits and pieces of it, it doesn´t bother them.
Cool neighbors