Lexicon DC-1 User Manual download pdf (Page 39)

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.

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Lexicon DC-1 User Manual Page 39