You may have bought the best Concerto 901 Home Theaters but
 still may not have the sound effects that you have listened in your 
friend’s house. It is not that your friend is luckier or your home 
theater is inferior. The two reasons of such inferior effects may be the
 incorrect placement of the components and speakers or the acoustics of 
your room.
You
 must remember that home theater systems manufactured now can perform in
 any room provided that the placement and acoustics are in accordance to
 the specifications and requirements of the system. Modern home theater 
systems are complex and have better features to provide you with the 
exact feeling of a multiplex with only you in the audience.
It
 does not require any specific room designed for it like a celebrity 
screening room or the high end theme room that you may have seen. You 
also do not require a lot of cable and other hookups during 
installation. You just have to ensure that all the connections are made 
perfectly, fitted to the right sockets and placed as required and 
mentioned in the instruction manual.
Maybe
 the TV that you have is not in sync with the additional components that
 you have bought along with the Concerto 901 Home Theaters. Like you may
 have bought a 3D reverberator to produce that natural sound effect but 
the TV specification may not be in tune with the requisites.
It
 may be so that you have bought a 7.1 channel system while your room’s 
specification allows only 5.1 channel system. In such a case you will 
not have a distinct and clear audio. The same will be the case if you 
buy a smaller system for a bigger room.
There
 may be too much fabrics or galls in your room which may also have an 
adverse effect of the functionality. Simple change the fabrics, cover 
the glasses with paper to alter the acoustics and see the difference.