Yamaha YRS-2500 Owner's Manual page 134

When surround effect is not enough
The unit achieves its surround sound effects by projecting sound beams which reflect
off walls. The sound beams are not reflected toward to the listening position caused by
furniture, etc., in the path of sound beams, or the room shape. In this case, the sound
may become unbalanced.
Figure 1. Ideal condition
If the sound beams are not reflected toward to the listening position (figure 2), you can
adjust for this by installing the optional sound reflection board YRB-100.
• YRB-100 may not be available in some countries or regions.
Figure 2. Surround right beam is not
being reflected because there
is no wall.
Surround right is quieter than surround
(left), or surround right is in front of its
proper location.
Figure 3. With a sound reflection board
installed
The sound beam for surround right is
reflected correctly, and correct surround
sound effect is achieved.
Installing and adjusting the sound reflection board
YRB-100
1
Decide the position of the sound reflection board.
Install the sound reflection board as shown in the picture.
• Always hold the pole when moving the sound reflection board.
• Use "CHANNEL LEVEL" in the setup menu (p. 49) to determine the precise direction from which
sounds are difficult to hear.
Recommended position for installation
Front side
Approx. 1.5 to 3 m
Surround side
Approx. 1 to 2.5 m
YRB-100
Front side
Install the panel front side of the
listening position, and outside of
the surround side panel.
Listening position
Surround side
Install the panel back side of the listening
position, and inside of the front side panel.
When surround effect is not enough
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