Eighteen Sound 12ND930

Subwoofer

12″ / 300 mm
Nominal diameter
50 Hz
Resonance
0.21
Q factor
97 dB
Sensitivity
± 6.5 mm
Linear excursion
800 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
97.0
dB
Frequency response
46 - 4500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
50.0
Hz
Mechanical quality factor
QMS
5.64
Electrical quality factor
QES
0.22
Total quality factor
QTS
0.21

Large signal parameters

Maximum linear excursion
xmax
6.5
mm
Air volume displaced at xmax
VD
345
cm³
Power handling
P
500
W
Program power
Pmax
800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.5
Ω
Inductance (1kHz)
LE
1.65
mH
VC Diameter
75
mm
Winding material
Copper

Magnet

Force factor
Bl
21.2
N/A
Motor constant
Bl/√RE
9.04
N/√W
Material
Neodymium

Diaphragm

Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
57
g
Moving mass (without air load)
MMD
48.2
g

Suspensions

Stiffness
KMS
5.62
N/mm
Compliance
CMS
178
µm/N
Equivalent volume to the compliance
VAS
70
L
Mechanical resistance
RMS
3.18
N·s/m

Dimensions

Nominal diameter
12
300
mm
Overall diameter
315
mm
Baffle cutout diameter
282
mm
Overall depth
140
mm
Flange thickness
11
mm
Mounting depth
129
mm
Volume occupied by the driver (estimated)
2.2
L
Net weight
4.4
kg
Eighteen Sound 12ND930 Impedance
Eighteen Sound 12ND930 SPL
Eighteen Sound 12ND930 Dimensions

Export this driver to a simulation software:

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