Neighbor Complaining...

Get a house, headphones or a louisville slugger.

Moving the speakers to the other wall will help however you can greatly reduce the sound transmission through the common wall by screwing 2"x1" timber battens @ 18" centres to the common wall with 1/4" rubber pads between the battens and the wall at the fixing points. Fix 2" fibreglass insulation floor to ceiling between the timber battens and screw/glue 2 sheets of 5/8" (16mm) dense plasterboard one on top of each other, to the timber battens leaving 1/4"-1/2" gaps at both floor and ceiling which you then seal with silicone sealant.

If all of the above good suggestions fail --buy 2 jl audio f113 subs --you will get rid of the neighbors as well as any insects that may inhabit the building :) good luck with your situation

Interesting comments about subs...I used to use my sub in order to get the neighbors to be quiet. My upstairs neighbors had a young son who would sometimes make a whole lot of noise...if he got loud, I was always able to get louder. I would say push for the eviction!

Have fun,

Place the speakers on the opposite wall. Then hang a nice area rug on the wall with a pleasing design to it . If that doesn,t work....call Tony and Pauly and the use the rug to get rid of your problem ! Cheers