10
AVR
Introduction to Home Theater
Introduction to Home Theater
This introductory section will help you to familiarize yourself with some basic concepts
unique to multichannel surround-sound receivers, which will make it easier for you to
set up and operate your AVR.
Typical Home Theater System
A home theater typically includes an audio/video receiver, which controls the system
and supplies amplification for the loudspeakers; a disc player; a source component for
television broadcasts (cable box, satellite dish receiver, HDTV tuner or antenna connected
to the TV); a TV or video display; and multiple loudspeakers.
Multichannel Audio
The main benefit of a home theater system is its ability to produce “surround sound.”
Surround sound uses multiple speakers and amplifier channels to immerse you in the
audio/video presentation for a dramatically increased sense of realism.
Your AVR may have up to seven main speakers connected directly to it, plus a subwoofer.
Each main speaker is powered by its own amplifier channel inside the AVR. A system
with more than two speakers is called a multichannel system. The different main speaker
types in a home theater system are:
Front Left and Right: The front left and right speakers are used as in a two-channel
system. In many surround-sound modes, these speakers are secondary, while the main
action, especially dialogue, is reproduced by the center speaker.
Center: When you are watching movies and television programs, the center speaker
reproduces most of the dialogue and other soundtrack information, anchoring it with the
picture. When you are listening to a musical program, the center speaker helps to create
a seamless front soundstage, creating a realistic “you-are-there” listening experience.
Surround Left and Right: The surround left and right speakers produce ambient sounds
that help create a realistic and immersive surround-sound environment. They also help
recreate directional sound effects such as aircraft flyovers.
Many people expect the surround speakers to play as loudly as the front speakers.
Although you will calibrate all of the speakers in your system to sound equally loud at the
listening position, most artists use the surround speakers for ambient effects only, and
they create their programs to steer relatively little sound to these speakers.
Subwoofer: A subwoofer is designed to play only the lowest frequencies (the deep
bass). It augments smaller, limited-range main speakers that are usually used for the
other channels. Many digital-format programs, such as movies recorded in Dolby Digital,
contain a low-frequency effects (LFE) channel that is directed to the subwoofer. The LFE
channel packs the punch of a rumbling train or airplane, or the power of an explosion,
adding realism and excitement to your home theater. Some people use two subwoofers
for additional power and for even distribution of the sound.
Surround Back Left and Right (AVR 1710S/AVR 171S only): Surround back channel
speakers are used with surround modes such as the Dolby Digital EX, Dolby Digital Plus,
Dolby TrueHD, DTS-ES
®
(Discrete and Matrix), DTS-HD
™
High Resolution Audio, DTS-HD
Master Audio
™
and Logic 7
®
7.1 modes that are designed for 7.1-channel systems.
Front Height Left and Right (AVR 1710S/AVR 171S only): Your AVR includes Dolby Pro
Logic IIz decoding, which uses the AVR’s Assigned Amp channels as front height channels.
The addition of front height channels – an additional pair of speakers positioned above
the front left and right speakers – produces a surround-sound experience with added
depth and dimension by creating lifelike sound that comes at you from varying heights.
NOTE: You can set up your system to use either surround back speakers or front height
speakers; you cannot use both.
The surround back and front height channel speakers are optional. If your system does
not include surround back or front height speakers, you can set up your AVR with a
5.1-channel surround-sound system in the main listening area, and you can reassign
the surround back channel amplifiers to power loudspeakers located in another room
in a multizone system.
Surround Modes
There are different theories as to the best way to present surround sound and to
distribute each audio channel’s sounds to the surround-sound system’s speakers.
A variety of algorithms have been developed in an effort to recreate the way we hear
sounds in the real world, providing you with a rich variety of options. Several companies
have developed different surround-sound technologies, all of which can be accurately
reproduced by your AVR:
• Dolby Laboratories: Dolby TrueHD, Dolby Digital Plus, Dolby Digital, Dolby Digital
EX (AVR 170S/AVR 171S only), Dolby Pro Logic
®
II, Dolby Pro Logic
®
IIx and IIz (AVR
170S/AVR 171S only).
• DTS: DTS-HD High Resolution Audio, DTS-HD Master Audio, DTS, DTS-ES (Discrete
and Matrix), DTS Neo:6
®
, DTS 96/24
™
.
• HARMAN International: HARMAN NSP, HARMAN Headphone.
• Stereo Modes: Generic modes that expand upon conventional two-channel stereo,
including 5CH Stereo and 7CH Stereo (AVR 1710S/AVR 171S only).
Appendix Table A10, on page 41, contains detailed explanations of the different
surround-sound options available on your AVR. Digital surround-sound modes, such as
the Dolby Digital and DTS modes, are available only on specially encoded programs,
such as those available via HDTV, DVD and Blu-ray Disc media and digital cable or
satellite television. Other surround modes may be used with digital and analog signals
to create a different surround presentation or to use a different number of speakers.
Surround-mode selection depends upon the number of speakers in your system, the
program you are watching or listening to, and your personal tastes.
