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Channel/Speaker Designation
To set speaker size designations including the subwoofer, enter the MASTER MENU and navigate to the MAIN
(MAIN SPK) option first. Select from NONE, SMALL or LARGE to designate the main front speakers. If you
continue to navigate forward, the next channels to designate NONE, SMALL or LARGE are the CENTER (C SPK)
and SURROUND (S SPK) channels.
After designating those channels, next are the REAR CENTER (RC SPK) and SUBWOOFER (SW SPK) channels.
For these two channels, you only need to tell the DTX-9900 if they have speakers connected to them or not.
Select either NONE or EXIST to accomplish that and complete the channel/speaker designation process.
Configuring Room Characteristics
In order for your surround experience to be fully synchronized with the video playback of movies, the room
characteristics of the listening environment must be defined to the DTX-9900K. There are four settings total:
ROOM LENGTH, ROOM WIDTH, ROOM HEIGHT and ROOM ABSORPTION. Using a tape measure, obtain the room
dimensions, and briefly assess the ratio of hard, flat and dense versus soft, textured and thin surface area
(including furniture, floor covering etc.).
To set the ROOM CHARACTERISTICS, enter the MASTER MENU and navigate to the ROOM LENGTH option first.
Select a length between 2 - 9.9M.
Continuing forward in the menu, for ROOM WIDTH, select a width between 2 - 9.9M. For ROOM HEIGHT, select
a height between 1.8 - 3.1M.
Lastly, for the ROOM ABSORPTION setting, a range of 10 -90 can be entered.
A setting of 10 would imply that the listening environment has a firm majority of hard, flat and dense surfaces,
leading to extremely reflective sound activity. A settings of 90 would imply the opposite, leading to very non-
reflective sound activity. In general, the more absorbing a listening environment is the smoother and warmer the
audio is. The reason being is that when soundwaves bounce off reflective surfaces, they can cause phase shift,
stereo positioning and DSP application problems. So ensure this setting is made for optimal sound quality.
Configuring Channel Delays
In order for your surround experience to be fully synchronized with the video playback of movies, the CHANNEL
DELAY settings must be set accurately to match your listening environment. The only channels that this applies
to are the CENTER and SURROUND channels.
To figure out the correct DELAY times for your listening environment, using a tape measure, measure the
following distances: front speakers to listening area, surround speakers to listening area and center speaker to
listening area. Also, note that sound travels 1 foot per millisecond.
After the above information is collected, this is how the DELAY times are deduced:
• CENTER DELAY time is the distance between the listening area and the CENTER speaker(s) subtracted from
the distance between the listening area and FRONT speakers. The number of feet is converted to milliseconds,
1 foot = 1 millisecond.
• SURROUND DELAY time is the distance between the listening area and the SURROUND speaker(s) subtracted
from the distance between the listening area and FRONT speakers. The number of feet is converted to
milliseconds, 1 foot = 1 millisecond.
Once you have the DELAY settings ready, enter the MAIN MENU and navigate to the CENTER DELAY (C. DEL)
option and enter the DELAY setting of milliseconds.
Continuing forward in the menu is the SURROUND DELAY (S. DEL) option, enter its DELAY setting in milliseconds.
Skip two menu options forward to the PRO-LOGIC II MOVIE SURROUND DELAY (PLII MOVIE S. DEL) option and
enter the same SURROUND DELAY setting as you did previously.
Continue forward to the PRO-LOGIC II MUSIC SURROUND DELAY (PLII MUSIC S. DEL) option and enter the same
SURROUND DELAY setting as you did previously.
Setup and Configuration
(cont.)
