W I L S O N A U D I O S P E C I A L T I E S , I N C .
F
I N A L
S
Y S T E M
T
U N I N G
A N D
V
O I C I N G
D
ETERMINING
S
IDE
TO
S
IDE
D
ISTANCE
The distance the speakers are from the side walls is very important. This dis-
tance determines the amount of comb filtering you will hear. In effect, you are “tun-
ing” the comb filter interaction between the speaker and the wall. Perform the side
to side analysis as follows:
•
Place a piece of tape on the floor parallel to the front edge of the speaker
and again mark off 1/2 inch increments side to side.
•
Using only one channel/speaker at a time, you will now determine the opti-
mum position with regard to the side walls.
Note: A high quality, solo piano recording works well for this step.
•
While the music is playing, slowly move the speakers left or right 1 inch
then 1/2 inch at a time until you achieve the best harmonic integrity.
You should not need to move the speaker any more than one inch left or
right from the original location. Do this independently for each channel. What you
will hear when the speaker moves into the correct location is a reduction of hard-
ness and muddied harmonics from the piano.
Note: If you continue moving the speaker past this point, you will begin to hear
again this fatiguing artifact.
When you have determined the optimum location for each speaker, mark
it carefully, and make certain the toe in is correct. When installing the spikes, the
speakers may shift slightly but you can move them precisely back to the correct lo-
cation again using your tape markers.
7-3
Summary of Contents for WATCH SURROUND
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