Theta Digital Casablanca III HD, Руководство пользователя

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right surround) often contain an equal amount of bass. Their bass, however, tends to be more related to the
soundtrack, vocal material or localized sources such as a drum beating behind the listener. This is important to
understand when setting up crossovers in the coming section.
Another misconception is that the center channel is "fill" and is of minor importance. Again, this is false. The center
channel contains the lion's share of important information (particularly dialog) in the cinematic experience. It is critical
that the center speaker be of the highest quality possible and special attention be given to its mounting and
positioning.
* * *
Speaker Configuration & Crossovers – Con’t.
1) Select Input # 1.
Connect a digital source to Coaxial Input 1 jack and verify that the input jack mapping is correct, i.e if the digital source
is connected to the coax input jack #
1 , press the A-D button until COAX 1 appears in the VFD above the A-D button.
2) With Input button # 1 selected:
a) Go to the SUB CONFIG submenu.
b) Set #SUBS to the number of sub woofers that are configured into the system.
c) If no subwoofer is present, set #SUBS to 0 . The subwoofer Full Range/Crossover setting has no
effect in this case.
Note : You will now be directed to set up crossovers as if a sub were present. There are some general rules that the
Casablanca III HD follows in the special case of no subwoofers:
Case 1 - The front left/right speaker configuration is set to FULL :
If the center speaker is set to "crossover" its low pass signal will be sent to the left/right channels.
If the surround left/right and or the surround center speaker configuration is set to “crossover” its low pass signal
will be sent to the front left/right speakers only if the mode is Dolby Digital or DTS.
Case 2 – The surround left/right speaker configuration is set to FULL :
If the center surround speaker is set to “crossover” its low pass signal will be sent to the left/right surround
channels.
Case 3 - The front left/right configuration setting is XOVER or FUL/LP :
Any speaker that is set to crossover will lose its low pass signal. The front center will route its low pass signal to
the front left/right speakers if the center configuration setting is
XOVERLR ).
3) Determine if the subwoofer needs to be sent a crossed over signal or a full range signal:
a) It is preferable to defeat the subwoofer’s internal crossover and set SUB to XOVER . The crossovers in the
Casablanca III HD have been engineered to be superior to any analog crossover, regardless of quality.
b) If the sub woofer’s internal crossover cannot be defeated set the SUB to FULL .
c) If the sub woofer must be sent a full range signal, set the crossover frequency on the sub woofer’s internal
crossover to match that of the speaker set that is crossed over in the Casablanca III HD. Example:
i) If the front left/right speaker set is crossed over to 60Hz, begin by setting the sub woofer’s internal
crossover frequency at 60Hz and in the Casablanca III HD, set the slope to match that of the sub
woofer’s slope when performing step # 8g. (Refer to the sub woofer’s documentation to determine
its slope).
ii) If multiple speaker sets are crossed over at different frequencies some experimentation will be
required with the crossover frequency of the sub woofer. The same applies if the slopes are set
differently for each speaker set. Begin by setting the subwoofer’s frequency and slope to match the
[front left/right] values. Experiment with the subwoofer’s crossover frequency by moving it towards
the crossover frequency of the [center], if installed.
4) Determine which speaker sets ([Front left/right], [Center], [left/right Surrounds], [center surround]) need crossovers.
a) If no speaker set is present, the CFG setting should be PHANTOM or OFF . If there are no side speakers,
the sides should be set to OFF .
b) When a speaker set is set to PHANTOM , its signal is not lost. If the front center speaker is set to
PHANTOM , the center channel signal will be routed to the front left/right speakers; if the surround center
speaker is set to PHANTOM , surround channel signals will be re-routed to the surround left/right speakers.
These re-routed signals can be adjusted in volume using the Phantom Level ( PHLV ) parameter. Begin with
the phantom level parameter at 0 and make fine adjustments after the setup is complete.
It is preferable that none of the speakers need a crossover, but is rarely practical. Keep in mind that with a 5.1
signal (Dolby Digital or DTS), any speaker can be confronted with a full amplitude signal at any frequency.
Generally speaking, the smaller the speaker, the more limited its bass capabilities. If a speaker set doesn't need
to be crossed over, that speaker sets’ configuration (
CFG ) setting should be FULL . Another possible option is Full
range with low pass ( FUL/LP ). With this setting, the speaker will be sent the full range signal, and a duplicate low