Well mine is correct in L f & R f, center channel and bass is good. The rear channel's or speakers do nothing.
I can have a piece of music playing and move my chair back to the rear speakers, Nothing is coming out.
When sitting directly in front of the computer screen, it dows sound like the SS r & SS l is playing at the level the rear speakers could be easily be heard.
If you move towards these speakers they ae non existant, as far as sound is concerned.