INTRODUCTION TO HOME THEATER
The AVR 3550HD may be the first multichannel surround sound receiver you have owned. This introductory section will help you to familiarize yourself with some basic concepts, which will make setup and operation smoother.
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 even distribution of the sound.
Typical Home Theater System
A home theater typically includes an audio/video receiver, which controls the system; a disc player; a source component for television broadcasts (cable box, satellite dish receiver, HDTV tuner or antenna connected to the TV); a video display (television); and loudspeakers.
Multichannel Audio
The main benefit of a home theater system is the placement of loud- speakers around the room to produce “surround sound.” Surround sound immerses you in the presentation for increased realism.
The AVR 3550HD may have up to seven speakers connected directly to it (plus a subwoofer). Each main speaker is powered by its own amplifier channel inside the receiver. A system with more than two speakers is called a multichannel system.
•Front Left and Right – The main speakers are used as in a
•Center – The center speaker is used for dialogue in movies and television programs, allowing the dialogue to originate near the actors’ faces, for a more natural sound.
•Surround Left and Right – The surround speakers improve direc- tionality of ambient sounds. In addition, more loudspeakers play dynamic soundtracks without risk of overloading any one speaker.
•Surround Back Left and Right – Additional surround speakers may be placed behind the listening position, improving the precision of ambient sounds and allowing for more realistic pans.
The surround back speakers are used with surround modes designed for
Many people expect the surround speakers to play as loudly as the front speakers. Although all of the speakers in the system will be calibrated to sound equally loud at the listening position, most artists use the surround speakers for ambient effects only, and they program their materials to steer very little sound to these speakers.
•Subwoofer – A subwoofer is designed to play only the lowest frequencies (the bass). It augments smaller,
Surround Modes
There are different theories as to the best way to present surround sound and to distribute information to the speakers. A variety of algo- rithms have been developed in an effort to reproduce the way we hear sounds in the real world, resulting in a rich variety of options.
Several companies have taken surround sound in different directions:
•Dolby Laboratories – Dolby TrueHD, Dolby Digital Plus, Dolby Digital, Dolby Digital EX, Dolby Pro Logic II and IIx, Dolby Virtual Speaker, Dolby Headphone
•DTS –
•Harman International (the Harman Kardon parent company) – Logic 7
•Stereo Modes – Generic modes that expand upon conventional
Table A12 in the appendix contains detailed explanations of the
mode groups and the mode options available within each group. Digital modes, such as Dolby Digital and DTS, are only available with specially encoded programs, such as HDTV,
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