Eighteen Sound 12NDA520

Woofer

12″ / 300 mm
Nominal diameter
50 Hz
Resonance
0.27
Q factor
101 dB
Sensitivity
± 4 mm
Linear excursion
450 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
101.2
dB
Frequency response
55 - 6000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
50.0
Hz
Mechanical quality factor
QMS
5.50
Electrical quality factor
QES
0.28
Total quality factor
QTS
0.27

Large signal parameters

Maximum linear excursion
xmax
4.0
mm
Air volume displaced at xmax
VD
212
cm³
Power handling
P
300
W
Program power
Pmax
450
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
0.03
mH
VC Diameter
65
mm
Winding material
Aluminum

Magnet

Force factor
Bl
14.4
N/A
Motor constant
Bl/√RE
6.31
N/√W
Material
Neodymium

Diaphragm

Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
36
g
Moving mass (without air load)
MMD
27.2
g
Material
Weather protected

Suspensions

Stiffness
KMS
3.56
N/mm
Compliance
CMS
281
µm/N
Equivalent volume to the compliance
VAS
111
L
Mechanical resistance
RMS
2.06
N·s/m

Dimensions

Nominal diameter
12
300
mm
Overall diameter
315
mm
Baffle cutout diameter
282
mm
Overall depth
125
mm
Flange thickness
11
mm
Mounting depth
114
mm
Volume occupied by the driver (estimated)
1.6
L
Net weight
3.0
kg
Eighteen Sound 12NDA520 Impedance
Eighteen Sound 12NDA520 SPL
Eighteen Sound 12NDA520 Dimensions

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Similar woofers to Eighteen Sound 12NDA520

Eminence LEGEND EM12 Guitar Speaker
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fS
49 Hz
SD
532 cm²
60 - 4900 Hz
QTS
0.28
xmax
1.3 mm
SPL1W
99 dB
Bl/√RE
6.58
Pmax
400 W