7
PERFECT VQ IN BANDPASS
ENCLOSURES
Use the sample curve and the charts
that follow to choose the bandpass
box that best suits your application.
Some additional terms used with
bandpass-enclosure specifications are
defined below. We recommend the
use of round, flared ports to minimize
distortion caused by air moving
through the port at high output.
• Vbs – Sealed-enclosure volume
• Vbv – Vented-enclosure volume
• Bandwidth – Indicates the passband
(range of frequencies between the
region of high-frequency attenuation
and the region of low-frequency
attenuation)
• In-car bandwidth – Indicates the
passband with the enclosure
mounted in the car
OTHER APPLICATIONS
Although there are quite a few
enclosures and applications listed here,
there are many other applications that
may suit your preferences. If you have
a computer and enclosure-design
software, the following Thiele and
Small parameters and the afore-
mentioned examples will provide you
with all the information and a starting
point from which you can experiment.
Because the inserts may be installed
and removed repeatedly, you may find
that a particular enclosure may serve
several applications using different
inserts. However, if you are using
several Kappa Perfect VQ woofers in a
single enclosure, the woofers
must all
use identical inserts simultaneously.
CHOOSING AN APPLICATION AND ENCLOSURE
In-Car In-Car
Vbs (ft^3) Vbv (ft^3) Pd (in) PL (in) F3 (Hz) Fmax (Hz) Insert Bandwidth (Hz) Fmax (Hz)
Kappa Perfect10 VQ and 10d VQ, Bandpass
0.6 0.35 3 10 42-82 65 low 20-80 +2 @ 30
0.6 0.35 3 10 40-80 70 mid 20-80 +.5 @ 27
0.6 0.75 4 11.5 35-70 70 none 20-70 +4 @ 35
Kappa Perfect12 VQ and 12d VQ, Vented
11410.5 38-68 51 low 20-60 0 @ 40
21.246.8 40-70 55 mid 20-65 +1.5 @ 26
21.2 4 10 30-63 55 none 20-55 +6 @ 26
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