I thank everyone for all their suggestions but there needs to be a little clarification on all this. I don't have a subwoofer and really don't beleive it's the low frequencies that are radiating from my apartment that are the problem. The fact that this is a corner apartment means that it does not border on any other apartment. The only place it does have a common wall with a neighbor is in the bedroon; far away from where the audio system is. I do have sheetrock walls but also have concrete floors and ceilings and various concrete internal support posts. My audio system in my living room near the front door is the only place it can be and is therefore permanent. I use speakers exclusively and do not like headphones. What I'm just trying to do, is suppress the intensity of the sound leaving the front door by either sealing the sides,top and bottom space around it with some kind of seal or by placing something on a temporary basis inside the apartment next or over the front door whenever I have an extended listening session. Again, thanks for all your kind assistance and thoughtfull suggestions
Barry M.
Barry M.