Technical Specifications and Operating Manual
10
· LT 3 PE
Settings · Controls
Setting up the AV receiver
To take full advantage of your LT 3 PE Home Thea-
tre System with Active Subwoofer, set the “Speak-
er Setup” section (Bass Management/Speaker
Management) of your AV receiver to “small” or
“normal” (not “large”) for the five satellite speak-
ers. This ensures that each speaker receives the
right amount of signal, and that the subwoofer
and front speakers have matching volumes. Also
in the receiver's “Speaker Setup” section (Bass
Management and/or Speaker Management), make
sure the subwoofer is set to “On”. Set the crosso-
ver frequency for the Columa 900 system to 100
Hz (or 120 Hz.)*
Setting up the subwoofer
If your system is based around an AV receiver, set
the subwoofer's Low Pass/Full Range switch to
“Full Range”; the AV receiver automatically deter-
mines the crossover frequency. Modern AV receiv-
ers determine the subwoofer's phase automati-
cally. This happens within the receiver's “Speaker
Setup” utility, which analyses the distance be-
tween the different speakers and the listening
spot. For this to work correctly, the subwoofer's
own phase switch needs to be on “0°”.
If your system uses an older-model AV receiver
or another type of amplifier without a setting for
the subwoofer distance:
The “Phase” control lets you adjust the subwoofer
to the satellite speaker so that the membranes
of all the speakers vibrate in the same direction
(“phase”) when reproducing signals around the
crossover frequency. If the phase is set incor-
rectly, this may cause a reduced bass response or
even bass cancellations.
If the subwoofer is positioned between the front
speakers, we recommend a phase setting of
“0°” (grey area in the diagram on page 8); if the
subwoofer is positioned closer to the listening
spot, a phase of “180°” may be more appropriate.
Similarly, the “180°” setting may help to eliminate
bass cancellations if you position the subwoofer
in other areas of the room. Always set the phase
control to the position where the bass response is
best. In order for the subwoofer's phase switch to
be active, the Low Pass/Full Range switch needs
to be set to “Low Pass”.
The subwoofer's output setting may vary slightly
depending on usage, e.g., home theatre sound
system or music playback. Whereas an action-
packed DVD typically contains very defined sub
bass signals, many music-only sources do not.
This is especially noticeable if your system is cali-
brated for optimum DVD playback. To find the best
compromise between differing sound sources,
use your own subjective judgement.
Our recommendation is to determine the best
subwoofer volume gradually over time.
Avoid configuring the subwoofer volume auto-
matically via your AV receiver's integrated room
analysis computer (advanced receivers only). In-
stead, set the subwoofer level provided in the
Bass Management/Speaker Management section
(“Speaker Setup”) to a high value, such as +8 to
+12 dB; this will guarantee that the subwoofer ac-
tivates itself at the right times when in “Auto On/
Standby” mode. You can then use the subwoofer's
own level control to experiment with different
bass levels that are suited to your various listen-
ing scenarios
* Either of the
specified crossover
frequencies can be used.
Try both to find out which
sounds best to you.