12″ / 305 mm
Nominal diameter
32 Hz
Resonance
0.49
Q factor
88 dB
Sensitivity
± 9 mm
Linear excursion
600 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.8
dB
Frequency response
31 - 500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
32.0
Hz
Mechanical quality factor
QMS
5.58
Electrical quality factor
QES
0.54
Total quality factor
QTS
0.49
Large signal parameters
Maximum linear excursion
xmax
9.0
mm
Air volume displaced at xmax
VD
460
cm³
Power handling
P
300
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.2
Ω
Inductance (1kHz, estimated)
LE
0.92
mH
VC Diameter
51
mm
Magnet
Force factor
Bl
13.2
N/A
Motor constant
Bl/√RE
7.38
N/√W
Weight
4.03
kg
Diaphragm
Effective diameter
255
mm
Effective area
SD
511
cm²
Moving mass
MMS
142.8
g
Moving mass (without air load)
MMD
134.6
g
Material
Pressed Wool / Paper
Suspensions
Stiffness
KMS
6.0
N/mm
Compliance
CMS
167
µm/N
Equivalent volume to the compliance
VAS
61.8
L
Mechanical resistance
RMS
5.15
N·s/m
Dimensions
Nominal diameter
12
″
305
mm
Baffle cutout diameter
297
mm
Mounting depth
140
mm
Volume occupied by the driver (estimated)
2.4
L
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