Acoustic Research ARW51 Installation And Operation Manual page 19

Distance Method
In a non-wireless arrangement the numbers you would enter the distances into your
Home Theater Receiver's configuration without any changes. The AR Modular Wireless
system operates at approximately 14ms of latency. This latency is the time delay from
when the signal enters the ARWT1 transmitter, is converted to a digital signal,
transferred wirelessly to the receivers, decoded and then amplified. When configuring
the time delay in your Home Theater Receiver, simply add 14 feet to the number
measured in your room. So for instance if you are using an ARW20 to make your rear
surround speakers wireless you would leave the front speaker delays the same, and
add 14 to the rear numbers:
NON-WIRELESS
FL = 12 feet
C = 10 feet
FR = 12 feet
SL = 5 feet
SR = 4 feet
If you are using an ARW51 system and all of your speakers are wireless, then every
speaker is delayed by the same amount. You do not need to add distance to each
speaker.
Delay Method
This method is used by a relatively small number of receivers because it requires you to
calculate the difference in delay between each speaker. In the above example of
distances, you would calculate the difference in milliseconds of delay for each speaker
and add delay only to those channels that are closer to your listening position. Please
refer to your owner's manual that came with your receiver for specific instructions on this
calculation. An example is below. This method can be complicated and is not normally
used. The method is to take the speaker that is furthest from your listening position and
subtract the distances for each other speaker. In the example below the longest
distance is 12 feet. So to find the delays for each speaker subtract the distance from that
speaker from 12 and this is your added time delay. Because the AR Modular Wireless
system operates on 14ms of delay, you should add 14 feet to the surrounds in the below
example. This usually changes the added delay substantially. In the case below, this
makes the maximum effective distance 19 feet with the added delay numbers
referenced from 19 milliseconds.
WIRELESS SURROUNDS
FL = 12 feet
C = 10 feet
FR = 12 feet
SL = 19 feet
SR = 18 feet
17