I live in a 'over (age) 55' apartment building. This means lots of folks with nothing to do but complain..
My small one bedroom apartment houses my stereo with Magnepan 3.6 speakers, and two turntables, a dozen disc spinners, with 4,000 LPs and 2,500 CDs. plus a few thousand DVDs.
The CDS are lining small 'hallway' areas. The DVDs are behind the Maggies. The LPs line two walls of the bedroom.
My Maggies are 42" out from the back wall, and tweets in, so the actual speakers are wider apart.
As one other poster here mentioned, one of the great benefits of Magnepan are the lack of thump going THROUGH the walls.
One other point is listening at lower levels is just as satisfying as blasting the stereo so the folks ten doors down know what you are playing
I think the average audiophile plays music too damn loud, and does so just 'because'. rather than it actually sounds better that way.
The problem is folks who play it loud just are not used to playing it softer. So the moment they hear it played quieter, it sucks. (But given time it becomes the norm and sounds great)
I listen at 50dB most of the time up to 70dB peaks, and 80dB (C weighted) is really LOUD to me.
No one had complained about my playing music, yet I am listening all day every day.
When I go to my local HiFi Salon, they are auditioning the music at 85dB with 95dB peaks. First thing I do it turn it down to audition stuff.