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Nominal diameter
Magnet weight
Nominal impedance
DC resistance (Re)
Resonance frequency (fs)
Total 0 factor (Qts)
Mechanical Q (Dms)
Electrical Q (QesI
Equivalent air volume (I/as)
Air volume displacement
Effective cone area (Sd)
Compliance (Cms)
Moving mass (Mms)
Voice coil diameter
Voice coil former material
Voice coil induct'ce (@lOOHz)
Linear excursion (Itmax)
Force factor (8f)
Acoustical efficiency (No)
Continuous power (Pe)
Sensitivity (SPLI
The VPC8D woofer offers the best performance/box size compromise usin
0.75-l .OO cubic foot Vented box. The Sealed box drives the -3dB frequency very
high (>80 Hz). An Infinite Baffle mounting (rear package shelf) is recommended only
for low power systems ( < 75 watts) due to possible over-excursion of the driver.
The Slngle-Vented Bandpass box offers a slightly lower -3dB frequency than the
Vented box but the efficiency will drop considerably. The Single-Vented Bandpass
box should therefore be used for installations requiring very high power handling
(Parameter values may deviate slightv in production units but the perceived performance variations will be negligible.)
l
8.0 in (2OOmm)
20 oz (0.56kg)
4 Q (ea. coil)
2.36 f2 (ea.)
41 Hz
0.45
8.50
0.48
0.85 ft3 (23.9 ltr's
0.07 ft3 (2.0 Itr's)
33.2 in2 (0.021 m*
3.7 x lo4 M/N
1.4 02 (419)
1.5" (38.lmm)
Kapton polymide
0.65 mH (ea.)
0.20 in (5.1 mm)
7.2 Tm
0.40 %
92 dB, 2.83v/lm
89 dB, lW/lm
. .
8.
(210
Woofer outline drawing
mm)
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