Theta Digital Casablanca III HD, Руководство пользователя, Страница: 56 / 106

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Crossovers
The Casablanca III HD contains a comprehensive set of speaker configuration settings. These settings are believed to
be the most complete ever offered in a home theater component and should allow any speaker to perform optimally
regardless of speaker type. It is important to bear in mind that the below procedure is merely a guideline and that
room acoustics, speaker design / quality, music / movie type, and personal preference all play a part in these settings.
Each full speaker configuration is stored separately for each INPUT SELECT button. In SETUP / INP Page 1 , press
button # 1 (labeled CONFIG on the VFD to access the speaker configuration menu.
In the speaker configuration submenu, pressing buttons 1 - 5 will access additional menus to setup each set of
speakers. For each speaker set there are three settings for the crossover type: "Phase Perfect", "Butterworth", and
"Linkwitz-Riley". It is possible to select one crossover type for the front left/right speakers, a different one for the
center and a third type for the surrounds. It is recommended that in the beginning, the same type be used for all until it
is time to fine tune. To help the user better understand the sonic consequences and individual advantages, please
refer to the 5 headings of the
Step-By-Step Setup guide on page 21
* * *
Press button # 1 to set up the front left/right speakers. This configuration submenu is shown in figure 24.
Figure 24 - Front Panel Display of the Front Left/Right Speaker Configuration
Submenu
Pressing button # 1 allows the configuration of the front left/right speakers. If these speakers are not to be crossed
over (a portion of their signal sent to the SUB output(s)), then the setting should be FULL .
FULL/LP is a crossover option which sends the full left/right channel information to the front left/right speakers and
duplicates the low pass portion in the subwoofer(s). If FULL/LP is selected, a crossover type must be selected (button
#
5 ), and the appropriate crossover frequencies and slopes set up using buttons 2 - 4.
Note : If the crossover type is Phase Perfect (
φ
PERF ) and the CFG type is set to FUL/LP , no low pass signal will be
created. This is a unique limitation of the Phase Perfect crossover type.
Should it be desired to crossover the front left/right speakers, the CFG setting (button # 1 ) should be set to XOVER
and the crossover frequencies and slopes in the Phase Perfect (
φ
PERF ), Linkwitz-Riley ( LINK-RILEY ) and Butterworth
( BWORTH ) submenus be set using buttons 2 , 3 and 4 respectively.
Note : It is advisable to select the same crossover frequencies and slopes in all 3 crossover type submenus (buttons 2 -
4 ), and then toggle the crossover TYPE (button # 5 ) and audition each crossover. Initially, this should be done with all
other speakers turned off. This procedure should be applied when configuring each speaker set.
Set up the crossovers as follows. Press button # 2 (
φ
PERF ). This submenu is shown in figure 25.
Figure 25 - Front Panel Display of the SETUP / INP / CONFIG / LT/RT/
φ
PERF Submenu