"I'm mainly concerned about playing CD's, specifically because the manager of the unit will be living directly below me."

Oh... no harm can come from this! Why don't you just save yourself the trouble, forfeit the security deposite, and move somewhere else instead? Hehehe

No, if you're going to stay there, I would either remove the sub from your system (if possible) or turn it down to the point that it is merely being used as a high pass filter to remove the low frequency information from the rest of your speakers. You may be surprised by how loudly you can play music without disturbing anyone if you cut the low frequencies to nil. Or course, you're not going to enjoy the sound of your system this way as much as you would otherwise, but living in an appartment setting with a good sound system is all about compromise. You're going to have to figure out what compromises you are willing to make for the sake of remaining there or you might as well take my previous advice; although meant to be facetious. One other option you may want to consider, if you haven't already, is a good set of headphones. It might make it bearable to listen to you system, bass removed or at low levels the majority of the time, if you can occationally put the phones on and crank it up. Just a thought. I don't envy your circumstances, but I do wish you the best of luck.

Q