You kind of need rear speakers or the music will kinda sound empty. I find so anyways. I find it sounds better to have something to fill the back.
That makes no sense unless you are installing multimedia, or DVD...Sound coming from the Back is something out of BOSE. Not even the most sophisticated 5.1 home theatre systems can get it right....You are better off with the the front and let the sound bounce around till it gets to yoru ears, as nature intended...Its very hard to get a good soundstage or imaging when the brain is being fooled by speakers behind...If you are not getting enough,,,I feel that maybe better tweeters are in order...I can tell you because I had excellent Vifas that got upgraded to outstanding Vifas, and the difference is unbelievable...