Arcam AVR200 - Manual (Page 10)

AVR200
10
To calculate these delay times, fi rst 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.
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.
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
CHANNEL DELAYS
CENTER N/A
REAR 21ms
DO NOT SAVE AND EXIT
SAVE AND EXIT
e.g. 3m
(9ft)
e.g. 4m
(12ft)
e.g. 2m
(6ft)
centre
front
left
front
right
rear
left
rear
right