Theta Digital Casablanca IV Owner'S Manual Download

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A note on home theater

There are a few common misconceptions about home theater and bass reproduction.  Chief among them is that the ".1"
or "LFE" channel contains most or all of the bass information.  This is unequivocally false.  The LFE channel contains
sound  effects  such  as  explosions,  rumbling  and  the  like.    All  other  channels  (left,  center,  right,  left  surround,  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.

Speaker configuration will have been set to the owner’s specifications at the factory when the Casablanca IV was built
or upgraded. If the as-received configuration is wrong or has changed, please follow the steps below. Otherwise, go to

1) Select Input # 1.

Connect a digital source to HDMI Input 1 jack. If no sound is heard, press the

A-D

button until

HDMI

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 subwoofers that are to be configured into the system.

c) If no subwoofer is present, set

#SUBS

. 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 IV 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 back surround speaker configuration is set to “crossover” its low pass signal will
be sent to the front left/right speakers.

3) Determine which speaker sets ([Front left/right], [Center], [left/right Surrounds], [back Surrounds]) need crossovers.

a) If no speaker set is present, the

CFG

setting should be

OFF

. If there are no surround speakers, the surrounds

should be set to

OFF

b) When a speaker set is set to

OFF

, its signal is not lost. If the Center speaker is set to

OFF

, the center channel

signal will be routed equally to the front left/right speakers; if the back surround speakers are set to

OFF

and

the program material contains back surround material, back surround channel signals will be rerouted to the
surround left/right speakers

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.

If all speaker sets are set to "

FULL RANGE

the following section (Steps 5-9) on setting crossovers may be skipped.

5) Do the following for each of the four speaker sets (

LT/RT

CEN

SURRND, BK SRND

a) Go to that speaker sets’ configuration menu.
b) Review the frequency response as measured using Dirac Live® 96 kHz.

c) Using the Dirac Live® data, determine the low frequency capability of each speaker