Learn About Surround Sound Channels: 2.1, 5.1, 7.1, 9.1, and More!

When it is about the surround sound channels, the first number destine the number of main speakers. The second number destine the number of subwoofers, and the third number destine the number of “height” speakers.

Mastering Surround Sound: 2.1 to 9.1 Explained

Imagine you have decided to set up a surround sound system, and you are going to run across numbers 2.1, 5.1, 7.1, 7.1.2, 9.1, etc. As you see them again and again, you may begin to realize what they actually are. What is meant by the different speaker channels?

Let’s get acknowledged about the details of the different speaker systems and what their channel structure actually looks like. For getting the sound setup you are looking for, click any of the links.

What Do The Numbers in Speaker Channels Mean?

The First Number (ex: The “7” in 7.1)

Numbers in Speaker Channels

The first number of any speaker system configuration destines the number of principle speakers in the setup.
When it is about the main speakers, we refer to the front left, front right, center, and various surrounding speakers.

The Second Number (ex: The “1” in 2.1)

Number of Subwoofers

The second number of any speaker system configuration destines the number of subwoofers in the surround sound setup.
It is common to see a 1, which means there is one subwoofer in the setup, but you may come across a two now and then. While most surround sound systems could work great with one subwoofer, some people prefer the sound of two for their unique rooms.

The Third Number (ex: The “2” in 7.1.2)

Number of Height Speaker

The third number of any speaker system configuration destines the number of “height” of a speaker.
If two numbers are not enough, you may come across numbers like 7.1.2 or 9.1.2 in the home theater product search. While these numbers seem pretty complex, it simply gives room to define “height” speakers in the home theater surround sound system. Height speakers are usually located in the home theater room ceiling, but they could also be upward-firing speakers.

Stereo System: 2.0 and 2.1 Channel Speaker System

The 2.0 Surround Sound System

2.0 Surround Sound System

There will be two speakers beside your TV in this system – one to the left side and one to the right side. Your speakers will be powered by a well-manufactured receiver or even by an amplifier. Sometimes, the speakers are active, and they do not require a different power source. There will not have any subwoofer, and speakers, which would be compatible with any TV, DVD, and mobile devices, like phones and laptops.

The 2.0 stereo system is a basic stereo setup, which has no surround sound and is used to listen to music. It may be a start to a home theater, and it helps keep things simple in this type of setup. It could give a better sound than the tiny speakers that TVs come with, so there is nothing wrong with this simple setup.

The 2.1 Surround Sound System

2.1

2.0 stereo sound system could give the home theater a better sound compared to the two-speaker setup. You could have your left and right speakers on each side of the television. With the addition of one subwoofer, you could add bass and depth to the home theater sound system.

There are no surrounding speakers. For that, this setup is still pretty basic. But if you add the subwoofer, it will provide a more complex experience. You could hear lower frequencies better. You could enjoy a clutter-free home theater without those wires running everywhere!

Many soundbars are 2.1-channel setup. This setup is used to enjoy movies, TV, and music.

The 3.1 Surround Sound System

3.1 Surround Sound System

The 3.1 sound system is one kind of four-channel sound system with three main speakers and a subwoofer. The speakers have a left, a center, and a right speaker positioned accordingly. It would help if you positioned your subwoofer on the floor in the center of the setup; however, carpeting or hardwood can affect the sound. So please be attentive.

To reproduce dialogue, this addition of the center channel speaker is commonly used. While effects, music, and other stereo sounds will use the left and right speakers. The 3.1 system setup is still focused on only sound in the front and has no surround sound speakers. This feature is a great setup to create cinematic sound.

The 5.1 Surround Sound Systems

5.1

This 5.1 home theater system is a true surround sound system, and it is probably the most common home theater configuration. You must have seen it mentioned very frequently when browsing home theater products. Home theaters of any shape and sizes rely on a 5.1 surround system for a better audio experience.

It has six channels, including five principal speakers and a subwoofer. Three speakers are located in the front. One in the left. One in the center and one in the right. Two surround sound speakers are in the back of the room—one on the left side and one on the right side.

While there are so many configurations for this setup, the ideal setup is with the front left and front right speakers. It might be a 22-30 degree angle from the center speaker/TV. And the surround sound speakers need to be at a 90-110 degree angle from the center speaker or the TV.

 For delivering surround sound, the 5.1 surround sound is the most common format. People could easily use it in everything, from DVD to movie theaters and TV. Many laptops and desktops come with a 5.1 sound card, which is accessible with this surround sound setup.

7.1 and 7.1.2 Surround Sound Systems

The 7.1 Surround Sound Systems

7.1

A 7.1 surround system has all of the elements of a 5.1 channel system and adds two more back speakers. It is an eight-channel system and is generally used in home theaters. In any 7.1 home theater surround system, the addition of two speakers in the rear gives a full experience of rounded sound because the two sides surround speakers would not be liable for both back and surround sound.

Location of the speaker for the original six channels of a 5.1 surround system, but the two back speakers should be placed ideally at a 135-degree to a 150-degree angle from the center channel for an optimal surround sound experience.

The 7.1.2 Surround Sound Systems

This configuration may seem complex when looking at the numbers, but the 7.1.2 surround system means a 7.1 surround sound setup. It has an additional two celling or upward-firing speakers. This setup is generally created with the help of Dolby Atmos if you want to learn more new things about the Dolby Atmos 7.1.2 speaker configuration and setup.

This surround system is best to use on a flat ceiling made of drywall or plaster. The height of the ceiling shouldn’t be more than 14 feet. This system is a higher-end experience of home theater.

This technology has become more common in home theaters. It gives a top-of-the-line, realistic, and immersive home theater experience. It also creates a dome of sound in the home theater. As long as the receiver is Dolby Atmos compatible, it could achieve this configuration.

The 7.2 Surround Sound Systems

7.2

The 7.2 home theater surround system is becoming a more wide surround sound speaker layout. Nowadays, more receivers are supporting this configuration. It has all of the elements of the 7.1 surround sound setup. But if you are adding one more subwoofer for a receiver to support this configuration. It will need two subwoofer outputs.

Some people are happy with one subwoofer. Other people use the 7.2 set up to balance bass in home theater. It is better than instead of loud or soft bass in different places of the room. The bass is equally distributed, and no matter wherever you are sitting, you could get the same bass experience.

If you love bass and you want to invest in an additional subwoofer, the 7.2 home theater surround system would be the best choice for you. Be careful; your neighbors could get annoyed with too much bass sound.

The Ultimate Experiences of 9.1 and 9.1.2 Surround Sound Systems

The 9.1 Home Theater Surround Systems

9.1

Any 9.1. home theater system is a ten-channel surround sound system. It includes nine speakers and one subwoofer. In addition to the components, it includes a 7.1 home theater surround system. The 9.1 surround sound also has two front-height speakers. The front-height speakers need to be placed on the front side of the room. Place it above the left and right main speakers. Remember that it needs to be about three feet above your left and right front speaker and face directly at the listener for the optimal sound.

This system is a very high-end home theater surround sound setup. It isn’t as typical as 7.1, 5.1, or lower. Highly dedicated home theater gurus use this. But you may achieve it by slowly adding components to the home theater system.

Consultants or experts could do this work properly. But there are many components and specs to be considered to set up this type of system properly.

The 9.1.2 Home Theater Surround Systems

This 9.1.2 home theater surround system has a slightly different setup than the 9.1 home theater system. While you may think that you’ll be adding two ceiling or upward-firing speakers to the 9.1 surround system configuration, you’re going to have two wide front speakers instead of two front-height speakers – in collation to the two ceiling speakers.

The total staff has left and right front speakers. One center speaker. One subwoofer. One left and one right front wide speaker. One left, and one right surrounds the speaker. One left and one right rear speaker. One left and one right ceiling speaker.

You could check out more information about the Dolby Atmos 9.1.2 speaker from google. This setup could create the immersive, high-end dome sound experience that the 7.1.2 had but adds a tier of sound with the left and right front roomy speakers.

Are There More?

You might be thinking that the setups we reviewed are enough to satisfy any home theater. But there are more options available for home theaters. So if you have not found the perfect setup for you, do not fret. Let’s talk about those new setups.

The 4.1 Surround Sound System

4.1

This 4.1 home theater surround sound system is another roomy configuration, and it includes one front left, one front right, one rear left, and one rear right speaker with one subwoofer. It is a five-channel setup. It could not include the metaphor center channel speaker.

The 6.1 Surround Sound System

This 6.1 home theater surround sound configuration is like a 5.1 surround system but includes an additional speaker. This additional speaker needs to be located in the center rear of home theaters. It helps to adjust another dimension except going to a full 7.1 surround sound setup. It could create a more realistic sound experience and makes for a roomy and fuller sound in home theater with only one collation.

In place of investing in two rear speakers, you’ll start with one and get a great effect on your money. Many people start with one and end up adding another later to move up to the 7.1 setups. But others see the addition of one back speaker as unimportant.

Surround Sound

The 10.2 Home Theater Surround Sound System

THX is the developer of the 10.2 home theater surround sound system. The running slogan for the setup is “twice as good as 5.1”. The configuration of this setup includes seven front channels: Left and right side speakers, height speakers, front speakers, and center front speakers. There are three surround speakers, including a left, a back, a right, and two subwoofers.

This surround sound system is the best way to set up a home theater. Some of the products are currently sold to accommodate this aspect. Only the most dedicated home theater experts will pursue this surround home theater sound system.

The 13.1 Home Theater Surround Sound and Beyond

The Dolby Digital Plus system supports this surround system up to 13.1 and many other surround sound configurations as 12.2, 22.2, etc. While these surround sound setups are difficult. They are rare in home theater. But they are fun to research and learn about, and there’s nothing wrong with dreaming of the possibilities!

Best Seller List of Surround Sound Systems:

SaleBestseller No. 1
VIZIO V-Series 5.1 Home Theater Sound Bar with Dolby Audio, Bluetooth, Wireless Subwoofer, Voice...
  • Low-Profile Modern Design - Clean silhouettes, subtle textures, and matte finishes seamlessly blend into any environment.
  • Powerful Performance - Brilliant clarity, thunderous bass, and Dolby Audio and DTS Digital Surround support combine for performance beyond its size.
  • Simple Setup, Streaming & Control - Get setup and listening in minutes with HDMI ARC and Bluetooth connectivity for unparalleled ease of use, control, and access to your content.
  • 5.1-Channel Sound - Experience a powerful room-filling, surround sound experience.
  • 6 Total Speakers - Full-range drivers deliver coherent sound and brilliant clarity.
SaleBestseller No. 2
Yamaha Audio YHT-4950U 4K Ultra HD 5.1-Channel Home Theater System with Bluetooth, black
  • Your purchase includes: 1 AV receiver, 5 speakers, 1 Sub-Woofer and Speaker wire.Waterproof : No
  • Dimensions: AV Receiver – 17” W x 6” H x 12” D | Four Speakers (each) – 4” W x 6” H x 4” D | Center speaker – 10” W x 4” H x 4” D | Subwoofer – 11” W x 11” H x 13” D
  • Technical specs: HDMI – 4 | Standby Power Consumption – ≤ 0.2 W | Frequency Response – 28Hz/25kHz
  • Bluetooth for streaming all your favorite music and podcasts. No wireless functionality
  • Easy setup with Yamaha YPAO room optimization and flexible speaker placement options, including virtual cinema front
SaleBestseller No. 3
ULTIMEA 5.1 Surround Sound Bar, Peak Power 320W, Surround Sound System Home Theater Sound Bar for...
  • Immersive Surround Sound by SurroundX Technology: SurroundX algorithm converts 2.0 PCM to 5.1 surround signal, which makes sound move around you. ULTIMEA soundbar for tv uses aerospace-grade magnets to have speakers deliver clear and distinct surround sound. Volume of rear surround speakers can be adjusted to 3 levels by pressing surround button on the remote.
  • Include 2 Surround Sound Rear Speakers: This 5.1 channel tv sound bar comes with 2 rear speakers and 1 subwoofer, which brings you the cinematic experience with our decoded playback device. A 19.6 feet cable is used to connect surround speakers to subwoofer so you can place surround sound speakers anywhere given your preference.
  • Customized Bass and Surround Sound: You can completely control your audio environment by adjusting the surround and bass volume given your preference, creating a truly bespoke audio experience. ULTIMEA sound bar for smart tv with subwoofer owns 3 models at different scenes for you: movie, dialogue, and music. You can switch it to any mode with one press on the remote controller.
  • Deep, Room-Filling Bass with Ultimate BassMAX Technology: To deliver a deep and powerful bass, this surround sound system for tv applies BassMAX Technology, enhanced magnetic circuit design, and a larger cabinet to this surround sound system for tv. Volume of subwoofer can be adjusted to 3 levels by pressing bass button on the remote.
  • Easy to set up & Decent Design: ULTIMEA sound bars for tv support multiple wired and wireless connection. With the help of ULTIMEA clear instructions, you can easily set it up and start exploring the fun of surround sound. This decent soundbar with subwoofer also allows you to place it on stand, cabinet or under the TV. Perfect to build your home theater sound system.
Bestseller No. 4
Klipsch Black Reference Theater Pack 5.1 Surround Sound System
  • The Klipsch reference theater pack delivers a superior acoustic performance while keeping an incredibly minimal footprint
  • Klipsch's exclusive Tractrix Horn technology and aluminum Tweeters deliver the cleanest, most natural sound possible. The down-firing wireless subwoofer is designed to deliver room-filling low frequencies without requiring too much floor space
  • To complement the easy placement of the wireless subwoofer, each satellite speaker has a keyhole mount and a threaded insert for maximum mounting flexibility
  • The reference theater pack brings the Klipsch cinematic sound into your home with an incredibly minimal footprint
Bestseller No. 5
Yamaha YHT-5960U Home Theater System with 8K HDMI and MusicCast
  • 5.1-channel 80-Watt powerful surround sound system
  • 4K60, 4K120AB and 8K60B HDMI 2.1 with HDCP 2.3 and eARC (4 in/1 out)
  • Dolby Vision, Hybrid Log-Gamma and BT.2020
  • Supports enhanced media and gaming - ALLM, VRR
  • YPAO automatic room calibration
SaleBestseller No. 6
GEOYEAO Sound Bar, Bass Speakers for Smart TV with Dual Subwoofer 3D Surround Sound System, 32 Inch...
  • 【2.2ch Sound Bars for TV】 It has a configuration of 2 inches x 2 tweeters + 2.25 inches x 2 woofers. This sound system combines a speaker with one chassis on each side and dual subwoofer dedicated to deep bass. Achieved a sound channel exceeding 2.1ch. (Suit for Amazon Fire, Sumsung, Hisense, Insignia-smart tvs.)
  • 🎵【32 Inch Unique Detachable Sound Bar】: It can be divided into two parts, place on both side of TV connect with base accessories. As a 2.2ch surround sound speaker, powerful bass turns movies, music and TV into an explosive experience. Or combine 2 in 1 placed on the table or as a wall mounted speaker with 830*100*75 mm(L*W*H) to fit into your home theater system.
  • 🎵【Multiple Input Connection】: This audio speaker supports multiple wired option including HDMI(arc), RCA, Optical, AUX input, and USB (Flash drive only) compatible with external TV, projector, PC, Blu-ray DVD player, XBOX gaming device, and more.
  • 🎵【Wireless Streaming with Bluetooth】: Easily stream all your favorite music, movies, podcasts, or audio books from your smart phone, tablet, or any smart device via Bluetooth 5.0 connectivity to the speaker bar.
  • 🎵【Ultimate Surround Sound TV Speakers】: Upgrade your viewing and listening experience from ordinary to extraordinary. With a built-in 3D superior DSP technology, this sound bar delivers powerful, crystal-clear audio, and you can easily switch between 10 different EQ modes, immersing you in the most incredible home theater sound environment.
Bestseller No. 7
Puxinat 2 in 1 Separable Sound Bars for TV with Subwoofer, Bluetooth 5.0 Surround System for Home...
  • 🍋VERSATILE 2-IN-1 DESIGN: Experience the best of both worlds with Puxinat upgraded detachable soundbar and subwoofer combo. Enjoy the convenience of a sleek soundbar for everyday use, or attach the powerful subwoofer for deep, rumbling bass that brings your entertainment to life.
  • 🍋DEDICATED 6.5’’ SUBWOOFER: Immerse yourself in a truly cinematic audio experience. Our new powerful subwoofer delivers crystal-clear dialogue, rich midrange, and immersive surround sound, creating an atmosphere that transports you right into the heart of your favorite movies, games, and music.
  • 🍋EFFORTLESS SETUP AND CONNECTIVITY: Say goodbye to complicated installations. Our soundbar and subwoofer system is designed for easy setup and seamless connectivity. Simply plug in the soundbar and subwoofer, and enjoy powerful sound within minutes. Bluetooth 5.0 enables you to connect the soundbar to your smartphone/tablet/laptop wirelessly. With 10 EQ modes to choose from, you can fine-tune the sound to match your content and create a personalized audio experience.
  • 🍋PREMIUM AUDIO QUALITY: Don't compromise on sound quality. Our 2-in-1 soundbar and subwoofer combination is built with premium audio components, ensuring clear, balanced sound across all frequencies. Hear every detail with precision and enjoy a truly immersive audio experience.
  • 🍋STYLISH AND SPACE-SAVING: Enhance your living space with our sleek and modern soundbar design. Its slim profile and detachable subwoofer allow for flexible placement options, fitting seamlessly into any home decor. Save space without sacrificing sound quality or style.
SaleBestseller No. 8
Goldwood Bluetooth 5.1 Surround Sound Home Theater Speaker System with LED Display, FM Tuner, USB/SD...
  • THE ULTIMATE HOME THEATER EXPERIENCE: Our 5.1 speaker system includes 5 speakers and 1 subwoofer; Delivers powerful surround sound while watching TV, gaming, or streaming music from your phone to the built in Bluetooth receiver
  • LED ILLUMINATED SURROUND SOUND: Each system features an integrated power amp with 300 watts of power while the LED illuminated subs display multi colored flashing lights in a variety of different patterns
  • GREAT FOR AT HOME ENTERTAINMENT: Use our sound equipment for binge-watching your favorite TV shows, for movie nights at home with the family, or for gaming on your computer, or for listening to music on your MP3 player
  • SYSTEM REQUIREMENTS: Our system is compatible with any standard 3.5 millimeter headphones, RCA stereo, or RCA 6 Channel surround audio outputs, and features a standard US 110V grounded wall plug
  • WHAT'S IN THE BOX: Acoustic Audio by Goldwood AA5400 powered subwoofer speaker, 5 passive wired satellite speakers, full function remote, 3.5 millimeter to RCA cable, 3 RCA to RCA jack cables, and an instruction manual
Bestseller No. 9
Sony HT-S40R 5.1ch Home Theater Soundbar System,black
  • Feel every note with a 600W power output
  • Get the best seat in the house with 5.1ch real surround sound
  • Rear speakers deliver powerful surround sound to complete your home cinema experience
  • Effortless setup with easy color-coded connections
  • Wireless connectivity for music streaming
Bestseller No. 10
Klipsch Black Reference Theater Pack 5.1 Surround Sound System, Bundle with Onkyo TX-NR696...
  • 4x Klipsch Satellite Speakers - Center Speaker - Subwoofer - Transmitter - Klipsch 5 Year Limited Warranty - Onkyo TX-NR696 7.2-Channel Network A/V Receiver - Remote Control, 2x AAA Batteries - Onkyo 2 Year Limited Warranty
  • The Klipsch reference theater pack delivers a superior acoustic performance while keeping an incredibly minimal footprint
  • Klipsch's exclusive Tractrix Horn technology and aluminum Tweeters deliver the cleanest, most natural sound possible. The down-firing wireless subwoofer is designed to deliver room-filling low frequencies without requiring too much floor space
  • To complement the easy placement of the wireless subwoofer, each satellite speaker has a keyhole mount and a threaded insert for maximum mounting flexibility
  • The reference theater pack brings the Klipsch cinematic sound into your home with an incredibly minimal footprint

FAQs

Question

Are any Home Theater Surround Systems, which have an even number of speakers?

If you need an even number of speakers, you will want to go with a 2.0 stereo system. You will find one 5.1 home theater surround system, one 7.1 or 7.1.2 surround system, and one 9.1 surround system. The 2.0 stereo method has two parts. One 5.1 surround system has six channels, 7.1 has eight channels, 7.1.2 has ten channels, and 9.1 also has ten channels.

What is the best number for a home theater speaker channel?

The aptitude number of home theater speakers channels depends on your room. Especially the size. If you have a little room, you will want to go with a smaller number of speaker channels, and it will optimize a bigger room with a huge number of speaker channels.
However, a small room could benefit from speakers placed in the front, the sides, the back, and on the ceiling (unless it’s a particularly low ceiling). Typically, you will get a good sound with a large number of speakers optimally placed everywhere in the room, based on the size.

Conclusion

Once you know what you are looking at, you will realize that surround sound channels are not all that confusing. I hope this article was helpful to you! I spent several hours researching and testing to find the best speakers out there for the best price!

-our editorial board has reviewed this article and has been approved for publication according to our editorial policy.

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Last update on 2024-05-24

With an impressive 15-year track record in the world of blogging, I have established myself as an expert in this field. The passion for home entertainment and electronics shines through in work, providing readers with valuable information and guidance on creating the ultimate home theater experience.