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DC-1 Digital Controller
Installation and
Calibration
Set CENTER DELAY to -1.5ms.Set CENTER DELAY to 2ms.
Once you have entered the distance to the nearest speaker, the DC-1 will
automatically calculate the maximum distance it can handle.
After the distance of the nearest speaker is entered, highlight TIME ALIGN-
MENT and press SELECT. A display will list all of the speakers, each with
a default distance setting equal to your nearest speaker. Use SELECT and
MENU ▲ and ▼ to highlight and enter actual distances for each speaker.
The DC-1 rounds off distance settings into discrete steps – choose the closest
step to the actual distance in these cases. If a speaker distance is further than
the DC-1 can accommodate, set it to the maximum allowable distance. (This
will vary, depending on your intial entry.)
Center Delay
(Base and THX versions)
Note that the Time Alignment parameter replaced the Center Delay
parameter in Base and THX versions of the DC-1, which allowed
electronic alignment of the center and left and right speakers.
The Center Delay parameter compensates for unequal distances be-
tween the center speaker and the listening position and the distance from
the listening position to the left and right speakers. The delay (relative to
the main left and right channels) can be adjusted between -5.0ms and
+9.5 ms in 0.5 ms increments. To get the correct setting by ear, listen for
a strong improvement in the imaging and stability of the soundstage.
Alternatively, you can measure the path length difference, and calculate
the correct setting. To do this, measure the distance (in feet) from the
tweeter(s) of your main speakers to your primary listening position.
Average these two numbers. Measure the path length from the center
speaker to your listening position, and subtract this distance from the
average path length of the main speakers. Set CENTER DELAY to the
same number of milliseconds as the number of feet of path length
difference. For example, if the path length of your main speakers is 14',
and the path length of your center speaker is 12', set the delay to +2ms.
If the path length of the center speaker is 15.5', set the delay to -1.5ms.
This adjustment globally affects all modes which use a center channel.