CHOOSINGAN APPLICATIONAND ENCLOSURE
PERFECT VQ IN BANDPASSHighlighted combinations are optimum.
ENCLOSURES In-Car In-Car
Vbs (ft^3) Vbv (ft^3) Pd (in) PL (in) F3 (Hz) Fmax (Hz) InsertBandwidth (Hz) Fmax (Hz)
Use the sample curve and the chartsKappa Perfect10 VQ and 10d VQ, Bandpass
that follow to choose the bandpass 0.60.3531042-8265low20-80+2 @ 30
box that best suits your application.0.60.3531040-8070mid20-80+.5 @ 27
0.60.75411.535-7070none20-70+4 @ 35
Some additional terms used with
Kappa Perfect12 VQ and 12d VQ,Vented
bandpass-enclosure specifications are
11410.538-6851low20-600 @ 40
defined below. We recommend the 21.246.840-7055mid20-65+1.5 @ 26
use of round, flared ports to minimize 21.241030-6355none20-55+6 @ 26
distortion caused by air moving
through the port at high output.
dBPerfect VQ Bandpass
105
Y Vbs � Sealed-enclosure volumeIN-CAR FMAX (+2 @ 27Hz)
IN-CAR BANDWIDTH
Y Vbv � Vented-enclosure volume100(20HZ - 60HZ)
FMAX (55Hz)
Y Bandwidth � Indicates the passband
95
(range of frequencies between the
region of high-frequency attenuationF3 (42Hz - 56Hz)
90
and the region of low-frequency
attenuation)
85
Y In-car bandwidth � Indicates the
passband with the enclosure 80
mounted in the car
75
70
65
20Frequency50100Hz2005001K2K
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.
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