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Installing surround speakers will greatly enhance
the surround experience as these add considerably
to the overall “ambiance.” Dolby Pro Logic encoded
material is deliberately limited in dynamic range
and frequency bandwidth for the surround channel
and thus only requires speakers of far lesser capa-
bilities compared to the front channels. Dolby
Digital, however, is a full range system with two
independent surround channels and with dynamics
equal to that of the front channels. For this reason it
is advisable to choose loudspeakers which are simi-
lar in power handling and performance capability to
those of the front channels. If you are using only
one pair of surround speakers, make sure to con-
nect them to the Surround Rear outputs. If you
choose to install another pair of surround speakers,
locate them behind your listening position, and con-
nect them to the Surround Back outputs. Surround
Back channels add to the spaciousness and coher-
ence of the sound field, but the Surround Rear
channels must be present for the desired effect.
Many film soundtracks rely heavily on very low fre-
quency sound effects which are difficult for normal
or smaller hi-fi speakers to reproduce. To faithfully
reproduce these low frequencies you can use a
specially designed low frequency loudspeaker with
its own built-in amplifier (“active subwoofer”).
Because it is difficult to hear which direction very
low frequencies are coming from, you only normally
need one subwoofer and this can be placed virtual-
ly anywhere in the room. Dolby Digital uses a
dedicated Low Frequency Effects (LFE) channel. If a
subwoofer has been selected, the LFE channel will
be fed to the subwoofer output.
First you need to indicate which speakers are pres-
ent in your system. Besides the Main speakers (Left
& Right), these can include a Center, two Surround
Speakers and a Subwoofer.
Call up the SETUP menu of the On Screen Display.
Select the SPEAKER SETTINGS.
Highlight PRESET and use the Left and Right arrow
buttons to select the preset (PRESET 1, 2 or 3) that
best applies to your setup. Select a preset based on
speaker sizes, then use the Up and Down arrow but-
tons to adjust for the absence of Center or
Surround speakers.
Preset 1: Main - LARGE; Center - LARGE; Surround -
LARGE; Subwoofer - ON
In this mode, all speaker channels are large, i.e. full
range, and the home theater system has a sub-
woofer. This preset is particularly useful for large
rooms.
Preset 2: Main - LARGE; Center - SMALL; Surround
- SMALL; Subwoofer - OFF
This preset is necessary for a home theater system
that does not have a subwoofer. The bass frequen-
cies from the center and surround channels are
redirected to the main speakers.
Preset 3: Main - SMALL; Center - SMALL; Surround
- SMALL; Subwoofer - ON
This preset is ideal for those systems using 5 small
speakers combined with a subwoofer. The bass
frequencies from each of these 5 channels are
redirected to the subwoofer.
NOTES:
Regardless of the available main speakers, select
Preset 2 when subwoofer is not available to redirect
bass frequencies to the main speakers.
The Surround settings affect both the Surround Rear
and Surround Back speakers.
INITIAL SETUP
SPEAKER SETTINGS
PRESET : 1
MAIN : LARGE
CENTER: LARGE
SURROUND : LARGE
SUBWOOFER : ON
DO NOT SAVE AND EXIT
SAVE AND EXIT
ADCOM OWNER’S MANUAL | 33