Boston Acoustics PRI665CV - Manual (Page 5)

5
Room Dimensions: use inches instead of feet and inches
Listener Position: Standing =64.4 inches (164mm); Sitting = 48.5 inches (14mm)
Speaker F Values
Speaker Good Better Best
PRI665CV 3.18 .606 .086
PRI685CV .619 .183 1.746
Note: Good coverage = ± 6dB; Better coverage = ± 3dB and Best coverage = ± 1.5 dB. Typically we recom-
mend Better coverage but if cost constraints make this impossible for the customer, then use the Good cover-
age. Best coverage is where you want very even coverage and typically either low or high SPL.
H
diff
= Ceiling Height – Listener Position
Spacing
max
= H
diff
x Speaker F value
Columns = Roundup ( room length / Spacing
max
)
Rows = Roundup ( room width / Spacing
max
)
Spacing
L
= room length / columns
Spacing
W
= room width / rows
First speaker is placed at (Spacing
L
/, Spacing
W
/)
Next column is placed at (Spacing
L
/+ Spacing
L
) … and so on until all columns are placed
Next Row is placed at (Spacing
W
/+ Spacing
W
) … and so on until all columns are placed
To determine how many subwoofer you require for a room, the calculations are much easier. You determine the
cubic feet of the room (L x W x H all in feet), divide this number by 15,000 and round up.
To determine the max SPL in the room, you need to know H
diff
in feet and the Max SPL of the speaker. Use the
following Max SPL at 3 feet for each speaker is:
Speaker Type Max SPL
PRi665CV 101 dB
PRi685CV 103 dB
PRi85SubCV 101 dB
/Ê­®
-«>Vˆ˜}
7/Ê­7®
-«>Vˆ˜}
7
КЙКУ
-«>Vˆ˜}
7
-«>Vˆ˜}
К
ЙКУ
W 23
W4 6 W 6 1 W 8 W 4 X r iD
W 23
W4 6 W 6 1 W 8 W 4 X r iD
Note: These are not the absolute max SPL for the speaker. These are
guidelines to use for designing systems.
142-002698-D OWNERS MANUAL PRICV5 5 10/4/07 3:24:06 PM