Eighteen Sound 12ND730
Subwoofer
12″ / 300 mm
Nominal diameter
45 Hz
Resonance
0.23
Q factor
96 dB
Sensitivity
± 6.5 mm
Linear excursion
600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.3
dB
Frequency response
53 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
45.0
Hz
Mechanical quality factor
QMS
5.13
Electrical quality factor
QES
0.24
Total quality factor
QTS
0.23
Large signal parameters
Maximum linear excursion
xmax
6.5
mm
Air volume displaced at xmax
VD
345
cm³
Power handling
P
400
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
1.73
mH
VC Diameter
75
mm
Winding material
Copper
Magnet
Force factor
Bl
19.2
N/A
Motor constant
Bl/√RE
8.11
N/√W
Material
Neodymium
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
55
g
Moving mass (without air load)
MMD
46.2
g
Material
Weather protected
Suspensions
Stiffness
KMS
4.41
N/mm
Compliance
CMS
227
µm/N
Equivalent volume to the compliance
VAS
90
L
Mechanical resistance
RMS
3.03
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Overall diameter
315
mm
Baffle cutout diameter
282
mm
Overall depth
132
mm
Flange thickness
11
mm
Mounting depth
121
mm
Volume occupied by the driver (estimated)
1.9
L
Net weight
3.8
kg
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SD
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SD
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