Ciare NDH18-4S

Subwoofer

18″ / 450 mm
Nominal diameter
31 Hz
Resonance
0.32
Q factor
94 dB
Sensitivity
± 11.5 mm
Linear excursion
2000 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
94.4
dB
Frequency response
30 - 200
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
31.0
Hz
Mechanical quality factor
QMS
9.80
Electrical quality factor
QES
0.33
Total quality factor
QTS
0.32

Large signal parameters

Maximum linear excursion
xmax
11.5
mm
Air volume displaced at xmax
VD
1339
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.1
Ω
Inductance (1kHz)
LE
1.9
mH
VC Diameter
100
mm

Magnet

Force factor
Bl
27.7
N/A
Motor constant
Bl/√RE
11.2
N/√W
Material
Neodymium

Diaphragm

Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
212
g
Moving mass (without air load)
MMD
188.8
g
Material
Treated Cellulose

Suspensions

Stiffness
KMS
8.07
N/mm
Compliance
CMS
124
µm/N
Equivalent volume to the compliance
VAS
239
L
Mechanical resistance
RMS
4.21
N·s/m
Surround material
Nomex
Spider material
Nomex

Dimensions

Nominal diameter
18
450
mm
Overall diameter
388
mm
Baffle cutout diameter
354
mm
Overall depth
195
mm
Flange thickness
13
mm
Mounting depth
182
mm
Volume occupied by the driver (estimated)
4.9
L
Frame material
Aluminium
Ciare NDH18-4S Impedance
Ciare NDH18-4S SPL
Ciare NDH18-4S Dimensions

Export this driver to a simulation software:

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