Theta Digital Casablanca III, Owner'S Manual

Page: 63 / 130

AVAILABLE SETTINGS
BUTTON PARAMETER
1 FR-HI 40 50 63 80 100 125 160
2 FR-HI-SLP 6 12 18 24
3 FR-LO 40 50 63 80 100 125 160
4 FR-LO-SLP 6 12 18 24
5
LP
φ
- +
Table 4 - Available configuration settings for front L/R speaker Butterworth crossover.
Press
SETUP twice to return to the speaker configuration sub menu, then press button # 2 ( CEN ) to set up the center
speaker. This submenu is shown in figure 31.
Center Speaker Configuration
Figure 31 - Front Panel Display of the SETUP / INP / CONFIG / CENTER Sub Menu
This submenu of settings is virtually the same as the one for the front left/right speakers, but applies only for the center
speaker. All of the same guidelines and procedures apply except for the case where no center speaker is present and
the destination to where the low pass signal (if the center speaker is crossed over) can be routed. In this case, the low
pass signal from the crossed over center will be routed to the sub, if one sub exists or front subs if there are 2 in the
front, when the
CFG setting is set to XOVER or FUL/LP . This same low pass signal can alternately be routed to the
front left/right speakers if the CFG setting is XOVRLR . If the center low pass signal is routed to the front left/right
speakers, and these front speakers are crossed over, the low pass signal from the center stays routed to the front
left/right speakers and the low pass signal from the front left/right will still be routed to the subs. If the
#SUBS is set to
0 and the front left/right CFG is set to XOVER , the low pass signal of the front left/right will be lost since it has no
where to go. This can be advantageous if the user wants to roll off the low pass signal to the front left/right speakers
at a very low frequency.
Routing the center low pass to the front left/right speakers can be useful with center speakers that have a very limited
bass response (-3dB @ 100Hz). In this case, the recommended crossover frequency should be set to 160Hz.
If no center speaker is present in the system, the CFG parameter should be set to PHANTM (phantom). With this
setting, the signal for the center channel is routed to the front left/right speakers. When the center CFG is set to
PHANTM , the user has the ability to adjust the phantom center level in the front left/right speakers. This can be
accomplished via button # 6 – PHLVL , or phantom level.
Note : The phantom ( PHTM ) setting for the center speaker creates the illusion of having a center speaker when the
listener is positioned equidistant from the front left and right speakers. There is, however, no substitute for a real
center speaker as it creates a solid center image even when the listener is positioned off-axis. The phantom setting is
most useful on video sources where a more prominent center image is desirable and no center speaker is present.
On music sources,
OFF may be the preferred setting as it maintains the original source’s imaging properties.
Pressing button # 1 allows the configuration of the center speaker. If this speaker is not to be crossed over, or any of
its signal sent to the SUB output, then the CFG should be set to FULL . There is an option where the full range signal
can be routed to the center speaker with the low pass part of it also routed to the sub ( FUL/LP ) or the high pass signal
going to the center and its crossed over low pass portion being routed to the front left/right speakers as discussed
above (
XOVRLR ). Whenever any speaker is crossed over, a crossover type must be selected, and the appropriate
crossover frequencies and slopes set up.
The center speaker can also be set to XOVER or OFF . In the case of OFF , any center channel information will be lost.
53