About your before 10PM question - you need to look up what your local law is about the acceptable decibel level of noise. You will almost certainly find out that unless you are playing your system ridiculously loud, that the level you do play it at is FAR below the legal limit.
As a professional horn player, I used to be very concerned about this when I lived in apartments, until I figured out that the legal limit in my area was far higher than the decibel level that any brass instrument is capable of creating. That said, I never did have a single complaint about my practicing, no matter how loud it was, but I never played after 9PM out of courtesy to my neighbors.
As a professional horn player, I used to be very concerned about this when I lived in apartments, until I figured out that the legal limit in my area was far higher than the decibel level that any brass instrument is capable of creating. That said, I never did have a single complaint about my practicing, no matter how loud it was, but I never played after 9PM out of courtesy to my neighbors.