Eighteen Sound 12NCX750

Coaxial

12″ / 300 mm
Nominal diameter
58 Hz
Resonance
0.29
Q factor
98 dB
Sensitivity
± 5.5 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
97.6
dB
Frequency response
60 - 5000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
58.0
Hz
Mechanical quality factor
QMS
6.42
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.29

Large signal parameters

Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
292
cm³
Power handling
P
400
W
Program power
Pmax
800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.62
mH
VC Diameter
75
mm
Winding material
Copper

Magnet

Force factor
Bl
17.5
N/A
Motor constant
Bl/√RE
7.53
N/√W
Material
Neodymium

Diaphragm

Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
48
g
Moving mass (without air load)
MMD
39.4
g
Material
Water repellent

Suspensions

Stiffness
KMS
6.37
N/mm
Compliance
CMS
157
µm/N
Equivalent volume to the compliance
VAS
63
L
Mechanical resistance
RMS
2.72
N·s/m

Dimensions

Nominal diameter
12
300
mm
Overall diameter
310
mm
Baffle cutout diameter
280
mm
Overall depth
148
mm
Flange thickness
14
mm
Mounting depth
134
mm
Volume occupied by the driver (estimated)
2.2
L
Net weight
4.5
kg
Eighteen Sound 12NCX750 Impedance
Eighteen Sound 12NCX750 SPL
Eighteen Sound 12NCX750 Directivity map
Eighteen Sound 12NCX750 Dimensions

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