Arcam Official Manual for Home Theater Systems: Mastering Delay Times for AVR200

To calculate these delay times, first measure (or estimate) the distances from the listening position to the front, centre and rear speakers. Keep a record of these distances by entering them under the heading ‘Your measurement’ in the table provided.

The centre channel delay is calculated by subtracting the centre channel distance from the front left (or right) distance. The difference represents the CENTRE delay time.

The rear channels’ delay time is calculated by subtracting the rear left (or right) distance from the front left (or right) distance. The difference represents the REAR delay time. Note that if your rear loudspeakers are further from the listening position than the front loudspeakers, you should set this delay to 0ms.

If you have made your measurements in feet, one foot approximates to one millisecond (1ms) delay. If you have made your measurements in metres, one metre approximates to three milliseconds (3ms) delay.

front	centre	front
left		right

e.g. 4m	e.g. 3m
(12ft)	(9ft)

e.g. 2m

(6ft)

rear	rear
left	right

Distance to listening position		e.g.	Your
			measurement
Front left or right	4m or 12ft		---------------------
Centre	3m or 9ft		---------------------
Rear left or right	2m or 6ft		---------------------

Difference	e.g.	Delay (ms)
CENTRE delay	(4 – 3m) or (12 – 9ft)
	= 1m or 3ft	3 milliseconds
REAR delay	(4 – 2m) or (12 – 6ft)
	= 2m or 6ft	6 milliseconds

When playing a Dolby Pro Logic or Dolby Pro Logic II source you can set a time delay (in milliseconds) for the rear channels. There is no delay setting for the centre channel.

The rear channel delay in Dolby Pro Logic is calculated by adding 15ms to the rear channel delay calculated for Dolby

Digital. In our example, this is 15ms + 6ms = 21ms.

CHANNEL DELAYS

CENTER N/A

REAR21ms

DO NOT SAVE AND EXIT SAVE AND EXIT

AVR200

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