• Surround Yourself with Sound

    Surround yourself with sound.

    Home Theater Surround Sound

    Surround Sound: A Complete Environment

    Audio accounts for 50 percent of the cinema experience. That's why your sound system and room acoustics are every bit as important as your TV.

    Good stereo can create a holographic space that puts the soundstage in front of you. But surround sound and especially Dolby Atmos® can create a whole new environment all around you. 

    How Many Speaker Channels?

    The number will depend on your room (and your budget). Here's what you'll need to optimize different media:

    • 5.1 channels: Most DVDs and Blu-ray Disc™ media, some Super Audio CD (SACD) discs, and some streaming sources
    • 6.1 channels: A few DVDs with Dolby® Digital Surround EX™ or similar encoding
    • 7.1 channels: Some Blu-ray Disc media (with more coming soon)
    • Dolby Atmos: Some Blu-ray Disc media (more coming soon); some streaming sources. See the Dolby Atmos Speaker Setup Guide for further information on Dolby Atmos configurations.

    A good 5.1-channel system can give you the full surround sound experience from most sources. More channels can improve the directionality of sound effects and add to the audio ambience of 3D. Dolby Atmos is a revolutionary new technology that creates audio "objects" and overhead sound to create a true multidimensional audio experience.  

    The Best System for You

    You can always start with a 5.1-channel system and build on it when you want, including moving to Dolby Atmos. More channels mean more speakers and more amplifier power, which add up to more money. If you're a dedicated audiophile or cinema enthusiast, and have both the room and budget, then by all means investigate the more complex setups. If you're a dedicated audiophile or cinema enthusiast, and have both the room and budget, then by all means investigate the more complex setups.

    And be sure to look into A/V receivers with Dolby technology.

    Speaker Setup

    Take a look at our speaker setup guides for complete information on speaker placement for any configuration. You'll learn the advantages of each and the role of each speaker.

    Choosing Your Speakers 

    There's no substitute for listening to the speakers you're thinking about before you buy. But where do you start? 

    With thousands of speakers out there, stores carry only a relative few. And side-by-side comparisons are often not that useful. For one thing, the showroom will sound much different than your listening area at home. 

    So make your room size your starting point. 

    Bigger = Better?  

    Generally, smaller speakers won't play loudly enough in a big room, and large floor-standing models are wasted in a small room. 

    There is no correlation between speaker size and quality, and little between size and price. Many small speakers are of extremely high quality (and are usually priced accordingly). Having a small room doesn't mean you have to sacrifice quality. 

    Judge for Yourself 

    Here are a few tips: 

    • Determine your budget before you shop.   
    • Read some reviews to narrow your choices.   
    • Take your own demo material to the store.   
    • Choose discs or movies you know well.   

    If a store doesn't let you use your own discs, shop somewhere else. And remember, none of us hears in exactly the same way. Trust your own ears.   

    Speaker Setup 

    Take a look at the Dolby Home Theater Speaker Guide for complete information on speaker placement for any configuration. You'll learn the advantages of each configuration and the role of each speaker.

    A/V Receivers: The Heart of the Component System

    If you choose a component system, the A/V receiver (also known as the AVR) is your control center and power source. It combines: 

    • A preamplifier with audio and video controls, processors, inputs, and outputs 
    • A power amplifier to drive the speakers 
    • A radio tuner for FM and sometimes AM and satellite bands 

    Everything in your home theater system connects to the A/V receiver. Be sure you get one with several HDMI® inputs and enough other inputs for all your sources. See the Connections tab under Choosing the Right TV

    If you play LPs or plan to, make sure the receiver has a phono input. If not, you'll need a separate phono preamplifier (which start at about $150). 

    How Much Power? 

    The simple answer is "as much as you can afford." Look for a minimum of around 50 to 80 watts per channel. 

    You can't have too much power, but you can have too little. Surprisingly, small speakers sometimes require more power than larger ones. Check the power ratings for your speakers and don't go under that. It's best to get more power than you think you'll need. 

    See Power Ratings in the Buying Tips tab of this page for more details. 

    Room Calibration 

    Nearly all A/V receivers now include room calibration to help you fine-tune your speaker placement. It uses a microphone (generally included) and self-generated test tones. The more expensive the receiver is, the more sophisticated the circuitry. 

    Other Features 

    Full-featured A/V receivers offer many additional features that can improve your experience. Here are a few to look for:

    • HDMI® connections
    • Advanced processing, such as Dolby TrueHD and Dolby Atmos
    • Video upscaling to improve the quality of lower-resolution videos 
    • USB connectors for the PC 
    • Docks for popular MP3 players 
    • Wi-Fi capability 
    • Ethernet connectors for direct Internet 
    • Built-in volume leveling, such as Dolby Volume

    First Step: Read the Manuals 

    Although the owner's manuals for A/V receivers can seem more complicated than the products themselves, reading some manuals before you buy can help you make a better choice and save you a lot of time later. 

    Separate Components 

    The use of separate components—specifically, power amplifiers and preamplifiers (or control centers)—is an alternative to A/V receivers. Advantages include: 

    • Flexibility—more easily expandable, especially for adding channels 
    • Power capability, a consideration in large rooms 
    • Potential for better overall performance 

    The disadvantages of using separate components include: 

    • Space requirements 
    • Complexity 
    • Expense 

    Home-Theater-in-a-Box (HTIB) Systems 

    These prematched systems offer a number of advantages:   

    • Simpler choices 
    • Slightly easier setup 
    • Often a great option for small rooms 

    Disadvantages include:  

    • Quality and size often directly related to the price 
    • Sometimes difficult to upgrade 
    • One-size-fits-all system not ideal for all rooms   

    Sound Bars 

    Sound bars are a very room-friendly alternative to separate loudspeakers. Many offer "virtual surround," simulating a five-speaker setup from just two channels. 

    As with any system, there are trade-offs:   

    • Efficient use of space, easy to hook up 
    • Huge improvement on built-in TV speakers 
    • Surround effects limited to a very small "sweet spot" 

    Speakers from One Manufacturer 

    Your speakers need similar "sound signatures" to create the most convincing surround effects. Choosing all your speakers from the same manufacturer will help ensure that consistency. 

    Most of the major manufacturers now offer prematched home theater sets, saving you the trouble of finding the separate speakers yourself. 

    Multichannel Playback from Your Stereo Recordings 

    Most receivers include Dolby Pro Logic II (or IIx or IIz) that can generate surround sound from any stereo source: 

    • Vinyl 
    • LPs 
    • CDs 
    • Videocassettes 

    The effect will vary, but live recordings in particular will deliver dramatic spaciousness. If your receiver offers Music and Movie modes, use those modes for listening and viewing. 

    MP3s: Don't Expect Too Much 

    Strangely enough, MP3 music recordings that sound great through earbuds on your commute probably won't sound as good on your home theater, especially at higher volumes. MP3 files are highly compressed, and you'll hear the difference very quickly. 

    Power Ratings 

    Receivers and amplifiers are rated in watts per channel. A typical specification (or spec) for an A/V receiver is 100 W × 5, meaning that each of the five channels can deliver 100 watts. 

    Ideally, all channels would be capable of delivering those 100 watts simultaneously, but this is usually the case only for top-of-the-line models or separate power amplifiers. 

    In everyday use, it doesn't matter that much—it's very rare for any movie soundtrack or music to reach peak levels in all five channels at the same time. 

    Although most speakers will play pretty loudly with only a few watts of input, you need the extra power to handle peaks, such as the sound of a gunshot. 

    Every 3 decibel (dB) increase in sound level (the minimum increase you can hear) requires doubling the power. A change in sound from 85 dB to 105 dB could easily mean going from 1 to 100 watts, even for an instant.