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Denon AVR-1803 Seite 30

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FL C
SW
FR
FL C
SW
FR
SL SR
SB
SL SR
SB
Multiple surround speakers
Movie theater sound field
Listening room sound field
In this case it is important to achieve the
same sense of expansion as in a movie
theater with the surround channels.
To do so, in some cases the number of
surround speakers is increased (to four or
eight) or speakers with bipolar or dipolar
properties are used.
• Other types of audio These signals are designed to recreate a 360° sound field using three to five
speakers.
In this case the speakers should surround the listener from all sides to
create a uniform sound field from 360°. Ideally the surround speakers
should function as “point” sound sources in the same way as the front
speakers.
FL C
SW
FR
SL SR
These two types of sources thus have different properties, and different speaker settings, particularly for the
surround speakers, are required in order to achieve the ideal sound.
SL: Surround L channel
SR: Surround R channel
SB: Surround back channel (1 spkr or 2 spkrs)
There are currently various types of multi-channel signals (signals or formats with more than two channels).
2 Types of multi-channel signals
Dolby Digital, Dolby Pro Logic, DTS, high definition 3-1 signals (Japan MUSE Hi-Vision audio), DVD-Audio,
SACD (Super Audio CD), MPEG multi-channel audio, etc.
“Source” here does not refer to the type of signal (format) but the recorded content. Sources can be divided
into two major categories.
Types of sources
• Movie audio Signals created to be played in movie theaters. In general sound is recorded to be played in
movie theaters equipped with multiple surround speakers, regardless of the format (Dolby
Digital, DTS, etc.).
(For 6.1-channel system)
18
ADDITIONAL INFORMATION
Optimum surround sound for different sources
Surround back speakers
A 6.1-channel system is a conventional 5.1-channel system to which the “surround back” (SB) channel has
been added. This makes it easy to achieve sound positioned directly behind the listener, something that was
previously difficult with sources designed for conventional multi surround speakers. In addition, the acoustic
image extending between the sides and the rear is narrowed, thus greatly improving the expression of the
surround signals for sounds moving from the sides to the back and from the front to the point directly behind
the listening position.
FL C
SW
FR FL C
SW
FR
SR chSL ch
SL ch SR ch
SB ch
Change of positioning and acoustic image
with 5.1-channel systems
With this set, speaker(s) for 1 or 2 channels are required to achieve a 6.1-channel system (DTS-ES, etc.).
Adding these speakers, however, increases the surround effect not only with sources recorded in 6.1 channels
but also with conventional 2- to 5.1-channel sources. All the Denon original surround modes (see page 23) are
compatible with 6.1-channel playback, so you can enjoy 6.1-channel sound with any signal source.
Movement of acoustic image from SR to SL
Change of positioning and acoustic image
with 6.1-channel systems
Movement of acoustic image from SR to SB to SL
2 Number of surround back speakers
Though the surround back channel only consists of 1 channel of playback signals for 6.1-channel sources
(DTS-ES, etc.), we recommend using two speakers. When using speakers with dipolar characteristics in
particular, it is essential to use two speakers.
Using two speakers results in a smoother blend with the sound of the surround channels and better sound
positioning of the surround back channel when listening from a position other than the center.
2 Placement of the surround left and right channels when using surround back speakers
Using surround back speakers greatly improves the positioning of the sound at the rear. Because of this,
the surround left and right channels play an important role in achieving a smooth transition of the acoustic
image from the front to the back. As shown on the diagram above, in a movie theater the surround signals
are also produced from diagonally in front of the listeners, creating an acoustic image as if the sound were
floating in space.
To achieve these effects, we recommend placing the speakers for the surround left and right channels
slightly more towards the front than with conventional surround systems. Doing so sometimes increases
the surround effect when playing conventional 5.1-channel sources in the 6.1 surround or DTS-ES Matrix 6.1
mode. Check the surround effects of the various modes before selecting the surround mode.
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