Kenwood UD-900M - Manual (Page 23)

Sound fields
The speakers provided with this system feature two different speaker systems in each cabinet. One is a conventional
3-way speaker system, and the other is an omni-directional (non-directional) speaker system housed in the top of
the speaker cabinet.
3-way speaker system Cross section of top half of
speaker system Top view of sound
transmission pattern
As shown in the diagrams above, these OIVIIMI TOP speakers incorporate non-directional sound transmission tech­
nology using a reflector to radiate the sound in all directions. This component system utilizes the special character­
istics of these speakers to create new, exciting sound fields.
One way it does this is with Acoustic modes, which create a natural sound field without electronically altering the
audio signal. Another is with Presence modes, which use a DSP (digital signal processor) to reproduce the atmo­
sphere of a live concert or theater performance that totally surrounds the listener.
Moreover, this system features a built-in Dolby decoder which allows you to experience the force and energy of a
theater movie with Dolby Surround Sound.
Make optimum use of these modes by selecting the sound field which best matches the input source as well as your
taste.
Mode Features and Characteristics
I Acoustic modes]
Acoustic modes create sound fields by making maximum use of the special characteristics of the OMNI TOP speakers provided with this
system. Three acoustic modes are available, NON DIRECTION 1, NON DIRECTION 2 and BGM.
(See Fig, 4.)
I Presence modes]
F. 4ch
The built-in presence speakers function to reproduce seven kinds of presence effects (disco, movie theater, arena, church, jazz ciub,
stadium, game) from the front speakers only. It also possible to create desired sound fields by fine adjustment.
(See Fig. 4.)
S. 4ch
Select this mode when the center speaker and surround rear speakers are connected. Seven kind of presence effects can be reproduced
similarly to F. 4ch.
(See Fig. 1.)
Al LINK equalizer effect
When F. 4ch or S. 4ch is selected, equalizer curves are automatically created according to the seven kinds of presence sound fields to
enhance them.
IWLBY SURROUND PRO LOGIC I
When video software tape or LD software disc marked C
enjoyed. il is played, a Dolby Surround effect similar to movie theaters can be
(See Fig. 1 and 3.)
IDOLBY3 STEREOl
Select this when the surround rear speakers are not used. This improves the positioning of the center sound. (See Fig. 2.)
When the input selector is set to TUNER, only the acoustic mode functions and other modes do not function.
UD-900/UD-900M (En) 23