Bedienungsanleitung Harman Kardon AVR146 (Seite 15 von 60) (Englisch)

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INTRODUCTION TO HOME THEATER

The AVR 146 may be the first multichannel surround sound receiver

you have owned. Although it has more connections and features than

two-channel receivers, many of the principles are similar and the new

concepts are easy to understand. This introductory section will help you

to familiarize yourself with the basic concepts, which will make setup

and operation smoother.

If you are already familiar with home theater, you may skip this section

and proceed to the Connections section on page 16.

Typical Home Theater System

A home theater typically includes your audio/video receiver, which

con

trols the system; a DVD player; a source component for television

broad

casts, which may be a cable box, a satellite dish receiver, an HDTV

tuner or simply an antenna connected to the TV; a video display (televi-

sion); and loudspeakers.

All of these components are connected by various types of cables for

audio and video signals.

Multichannel Audio

The main benefit of a home theater system is that several loudspeakers

are used in various locations around the room to produce “surround

sound.” Surround sound immerses you in the musical or film presentation

for increased realism.

The AVR 146 may have up to five speakers connected directly to

it (plus a subwoofer). Each speaker is powered by its own amplifier

channel inside the receiver. When more than two speakers are used,

it is called a multichannel system.

•

Front Left and Right – The main speakers are used the same way

as in a two-channel system. However, you may notice that in many

surround modes, these speakers are used more for ambient sound

while the main action, especially dialogue, is moved to the center

speaker.

•

Center – The center speaker is usually placed above or below the

video screen, and is used mostly for dialogue in movies and television

programs. This placement allows the dialogue to originate near the

actors’ faces, for a more natural sound.

•

Surround Left and Right – The surround speakers are used to

improve directionality of ambient sounds. In addition, by using more

loudspeakers in the system, more dynamic soundtracks may be

played without risk of overloading any one speaker.

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 a special-purpose speaker designed

to play only the lowest frequencies (the bass). It may be used to

augment smaller, limited-range satellite speakers used for the other

channels. In addition, many digital-format programs, such as movies

recorded in Dolby Digital, contain a special low-frequency effects

(LFE) channel which is directed only 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. Many

people use two subwoofers, placed on the left and right sides of the

room, for additional power and even distribution of the sound.

Surround Modes

There are different theories as to the best way to present surround

sound and to distribute soundtrack information among the various

speakers. A variety of algorithms have been developed in an effort to

accurately reproduce the way we hear sounds in the real world. The

result is a rich variety of surround mode options. Some modes are

selected automatically, depending on the signal being received from

the source. In many cases, you may select a surround mode manually.

Several companies have taken surround sound in slightly differing

directions. It is helpful to group the numerous surround modes either

by their brand name, or by using a generic name:

•

Dolby Laboratories, Inc. Modes – Dolby Digital, Dolby Pro Logic II,

Dolby Virtual Speaker, Dolby Headphone

•

DTS Modes – DTS, DTS Neo:6, DTS 96/24

•

Harman International (Harman Kardon’s Parent Company) –

Logic 7

•

DSP Modes – Generic modes that include Hall 1, Hall 2 and Theater

•

Stereo Modes – Generic modes that expand upon conventional two-

channel stereo, including DSP Surround Off, Analog Bypass Surround

Off and 5-Channel Stereo

Table 5 on pages 43 – 44 contains detailed explanations of the

differences between the various 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

DVDs and digital television. Other modes may be used with various

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 materials

you are watching or listening to, and your personal tastes.

Feel free to experiment.

AVR146-OM.qxd 5/10/07 10:16 AM Page 15

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