P
(cm)
F3
(Hz)
G
(dB)
A
(cm)
L
(cm)
P
(cm)
P1
(cm)
P2
(cm)
QTD
Fp
(Hz)
A
(cm)
L
(cm)
1
7,0
40,0
11,0
90
6,5
60
80
50,0
40,0
40,0
45,0
35,0
15 NOKAUT 1K5
VT: Total box volume
A: Height of the box or the rectangular air duct
L: Width of the box or the rectangular air duct
P: Depth of the rectangular box or air duct
P1: Shortest depth of the trapezoidal box
P2: Longest depth of the trapezoidal box
Pmax: Maximum air duct depth
Qtd: Quantity of air ducts
Diam: Diameter of the cylindrical air duct
F3: Lower cut-off frequency of the box
Fp: Peak frequency of the box
G: Standard gain in the box peak performance
G
F3
Fp
0dB
-3dB
Understand the meaning of the initials given in the above tables.
Dimensions and volume of the box
TRAPEZOIDAL BOX
EXAMPLE WITH RECTANGULAR AIR DUCT
P1
A
P2
L
Vol =
A x L x (P1 + P2)
2000
RECTANGULAR BOX
A
L
P
EXAMPLE WITH CYLINDRICAL AIR DUCT
Vol =
A x L x P
1000
NOTE: For the calculation of volume, you should use measurement units in centimeters.
Data for the Construction of Acoustic Boxes
Acoustic Boxes
For OUTWARD SOUND
use the P-length
For INWARD SOUND
use the Pmax-length
WARNING:
Adjustment of the air duct length
INSTALLATION INSTRUCTIONS
This loudspeaker should be connected ONLY to the REAR output of
the CD/DVD device plus a HPF filter rated to 50 Hz or above.
1 – Select the type of air duct (rectangular or cylindrical);
2 – Select the type of box (Rectangular o trapezoidal);
3 – Adjust the length of the air duct.
All measures recommended here are INTERNAL, and they generate the total volume
specified in the tables.
This manual contains two (2) box projects for each loudspeaker. If you already have a box but
it has a different internal volume, please call us through our toll-free phone at 0800-47-8002, so
that we can calculate new air ducts for your box.
Vented Boxes (Boxes with air ducts)
04
05
Diam
(pol)
P
(cm)
F3
(Hz)
G
(dB)
A
(cm)
L
(cm)
P
(cm)
P1
(cm)
P2
(cm)
QTD
Fp
(Hz)
3
4
11,0
85
56
5,4
80
53,0
40,0
38,0
43,0
33,0
15 NOKAUT 1K5
Woofers y sub-woofers need to be installed in acoustic boxes in order to work properly.
An acoustic box allows for the operation of a loudspeaker in optimal conditions for it to
reproduce sounds effectively and with quality, without incurring in damages due to excess of
excursion.
G ood r esp onse to transients;
Fr equen cy respo nse adju stab le
by the air d uct;
G ood b ass boo st;
Low dist ortion in tu ning freq uency ;
R ec om men ded for songs h aving extended
bass like: Jazz, MP B, classic, pop , Ax é, P agod e...
BOX with AIR DUCT
FREQUENCY RESPONSE
Table 05
Box with cylindrical
air ducts
BOX TYPE
BOX TYPE
AIR DUCTS
AIR DUCTS
RECTANGULAR
RECTANGULAR
TRAPEZE
TRAPEZE
Recommended
Recommended
Recommended
RESPONSE
Recommended
RESPONSE
Table 06
Box with rectangular
air ducts
