Hearing and Audio Receiver
There are people whom you can really categorize as sound enthusiast. Their sense of hearing is very keen that they can tell a wrong note from a song. These kinds of person of course would not want to settle anything less than the best when it comes to sounds and music.
So to satisfy their somehow insatiable want for sounds and music, audio receivers are developed. This would help sound coming out from devices be clearer and therefore more enjoyable. You see, it is not just with the speakers, one factor of the sound is also the amplification. Now, this is one of the things an audio receiver does. In other words, without the audio receiver, everything would be mediocre for sound enthusiast.