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Most dipoles have an arrow on them to indicate their orientation
towards the screen. So for the side dipoles, the arrows point
forward. For the back dipoles, the arrows should point towards
each other to achieve the correct acoustical phasing in the room.
Connecting speakers
2
34
5
6
7
10
1
8
2
34
5
6
7
10
1
2
34
5
10
1
67
8 9
89
10
8 9
10
8
(Only one surround back
speaker)
(Two surround back
speakers)
(Only one surround back speaker)
(Two surround back speakers)
1 TV or screen
2 Front left speaker
3 Subwoofer
4 Center speaker
5 Front right speaker
6 Surround left speaker
7 Surround right speaker
8 Surround back left speaker
or Surround back speaker
9 Surround back right speaker
10 Listening position
Subwoofer
A subwoofer is recommended for the highest bass effect.
Before connecting the speakers, place them correctly by
consulting the instruction manuals that came with them.
For surround playback, the configuration and placement of your
speakers are very important.
For THX surround EX playback, we recommend that you use a
THX speaker system that is certified by Lucasfilm Ltd.
Ideal speaker configuration
• Front right and left speakers
• Center speaker
Produces a rich sound image by serving as a sound source for
the front right and left speakers and enhancing the sonic
movement.
• Surround right and left speakers
Adds three-dimensional sonic movement and produces
environmental sound associated with the background and
effect sound for each scene.
• Surround back speaker
Required for enjoying THX Surround EX audio. For audio
using surround back right and surround back left speakers, a
separately-sold 2-channel power amplifier is required.
Lucasfilm/THX recommends the use of two Surround Back
speakers to enjoy the full potential of THX Surround EX. An
external stereo power amplifier will need to used to power the
two speakers from the Pre-Amp out terminals.
However, if you are unable to position two speakers in your
listening environment, a single surround speaker can be used
and the TX-DS787 has an internal amplifier to power this
speaker for your convenience.
• Subwoofer
Produces powerful and heavy bass.
Minimum speaker configuration for surround
sound playback
• Front right and left speakers
• Surround right and left speakers
The sound recorded for the center speaker and the subwoofer will
be properly distributed to the front right and left speakers for
optimized surround playback.
Speaker placement
Ideal speaker placement varies depending on the size of your room
and the wall coverings. Here, only typical example of speaker
placement and recommendations are shown.
Important points regarding speaker placement
Front left and right speakers and center speaker
• Place these three speakers at the same height from the floor.
• Place each speaker so that sound is aimed at the location of the
listener’s ears when at the listening position.
Surround left and right speakers
• Place these speakers so that their height is 1 meter higher than
that of the listener’s ears.
Surround back speaker/Surround back left and right speakers
• Surround back speaker is required for enjoying THX Surround
EX audio.
• Place these speakers behind the listener so that the angle
between each speaker and the listener is approximately 30
degrees.
• Place these speakers so that their height is 1 meter higher than
that of the listener’s ears.