8
J
Surround sound receivers and decod-
ers may require the user to configure
amplifier channels for different size
speakers. The selector may be:
• Switches in the back of the
amplifier.
• Front panel read-outs selected by
a remote control.
• On-screen video monitor options
selected by a remote control.
Be sure to set your surround sound
processor or receiver as follows:
Dolby Surround
®
with Pro Logic
®
• Center Speaker:
Normal
Dolby Digital
®
• Left and Right
Main speakers:
LARGE
• Center and Rear
(or Surround) speakers:
SMALL
(The
OFF
or
PHANTOM
center
channel mode cancels output to
the center channel of Dolby Digital
or Dolby Surround with Pro Logic.
Do not use these settings with
Ensemble IV HT.)
• Subwoofer or
Subwoofer Output:
OFF
See “Subwoofer Output
Note” on page 6.
Optimizing The
Sound Of Your System
It is almost impossible to find an
acoustically ideal placement for a
conventional, single-cabinet
speaker in a listening room. This is
because room acoustics affect the
low-bass frequencies differently
from the rest of the range. If you
place the speaker so that the room
helps the bass, it is likely to hinder
the upper ranges (and vice-versa).
Thus placing conventional speak-
ers almost inevitably entails a
compromise, even before proper
stereo effect, decor, and conve-
nience are taken into account.
The usual restrictions don’t
apply to
Ensemble IV
because its
subwoofer separates the low-bass
out from the rest of the range. You
can place the subwoofer and the
Surround Versus Stereo
Listening
When viewing movies or other
Dolby
®
-encoded programs, set your
receiver or decoder to Pro Logic or
Dolby Digital (AC-3).
Most TV broadcasts and almost all
music recordings are not Dolby
Surround-encoded. When listening
to this program material,
be sure to
turn off Pro Logic processing
. Switch
to either normal stereo operation or
some non-Dolby surround mode.
This will ensure correct stereo effect.
On program material that isn’t
encoded for Dolby Surround, the Pro
Logic circuits cause the center
speaker to play instead of the left
and right speakers. Most stereo
effect will be lost and the center
channel speaker will play too loudly.
A Dolby Digital system will not
produce any sound in the Dolby
Digital mode if the source is not
Dolby Digital-encoded.
Configuring Your Surround
Sound Electronics
