Eighteen Sound 12NTLW3500 8Ω

Subwoofer

12″ / 300 mm
Nominal diameter
53 Hz
Resonance
0.33
Q factor
95 dB
Sensitivity
± 8.3 mm
Linear excursion
1800 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
94.5
dB
Frequency response
50 - 3000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
53.0
Hz
Mechanical quality factor
QMS
8.00
Electrical quality factor
QES
0.35
Total quality factor
QTS
0.33

Large signal parameters

Maximum linear excursion
xmax
8.3
mm
Air volume displaced at xmax
VD
441
cm³
Power handling
P
900
W
Program power
Pmax
1800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
0.46
mH
VC Diameter
88
mm

Magnet

Force factor
Bl
19.5
N/A
Motor constant
Bl/√RE
8.63
N/√W
Material
Neodymium

Diaphragm

Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
80
g
Moving mass (without air load)
MMD
71.4
g

Suspensions

Stiffness
KMS
8.85
N/mm
Compliance
CMS
113
µm/N
Equivalent volume to the compliance
VAS
45
L
Mechanical resistance
RMS
3.33
N·s/m

Dimensions

Nominal diameter
12
300
mm
Overall diameter
310
mm
Baffle cutout diameter
282
mm
Overall depth
193
mm
Flange thickness
13
mm
Mounting depth
180
mm
Volume occupied by the driver (estimated)
2.7
L
Net weight
4.7
kg
Eighteen Sound 12NTLW3500 8Ω Impedance
Eighteen Sound 12NTLW3500 8Ω SPL
Eighteen Sound 12NTLW3500 8Ω Dimensions

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