A Well Balanced Music/Sound System

If you are a member of a band, you probably had played more than one musical instruments. I am pretty sure you are already familiar mixers like the numark mixers at musicians friend. It makes the sound balance, thus making the sounds more pleasing to the listener's ears. I love music, and I can tell when the sound is good or needs adjustments. My brother would really like to have a numark mixer for his sound system. I just hope I can get him one someday.