What Do The Numbers Mean In Surround Sound?


The numbers in surround sound terminology mean the amount of speakers used. Example surround sound numbers are 2.0, 3.0, 3.1, 5.0, 5.1, 7.0, and 7.1. When the number 5.1 is used, this means 5 main ear level speakers plus 1 subwoofer.

First number: 7.x.x = This number means the amount of main speakers at ear level.
Second number: x.1.x = This number indicates the number of subwoofers.
Third number: x.x.4 = This number shows the amount of speakers above ear level that add a 3D effect. (with a Dolby Atmos enabled home theater receiver)


EXAMPLE: Surround Sound 9.1.4
9 = Nine Traditional Speakers
1 = One Floor Standing Subwoofers
4 = Four Upward Firing 3D Speakers or Ceiling Speakers

NOTE: In the images below, the placing of some speakers may not be exactly correct. The images are to show the amount of speakers not the exact placing. Speakers need to be placed according to the room layout and size. All surround sound layouts will vary.

Types Of Surround Sound Systems:

A surround sound system consists of either an audio receiver or a soundbar. A soundbar is an easier way to get different variations of surround sound. Less wiring, smaller speakers, and bluetooth is an advantage of having a soundbar over a receiver. However using a receiver with high quality speakers is the best layout for a true movie theater experience.

How does a 5.1 audio system work?

5.1 is a multichannel sound technology with five channels of sound in the left, right, center, left-surround and right-surround positions. 5.1 surround sound system adds both surround and rear channel effects into 2 channels.

How does a 7.1 audio system work?

7.1 surround sound positional audio uses the standard front, center, and LFE (subwoofer) speaker configuration. A 7.1 audio system separates both the surround and rear channels into 4 different channels. The sound audio is processed to the left and right surround channels and the 2 rear surround channels.
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