Goldwood GW-212/8

Woofer

12″ / 305 mm
Nominal diameter
39 Hz
Resonance
1.44
Q factor
90 dB
Sensitivity
± 2.5 mm
Linear excursion
240 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

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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
89.9
dB
Frequency response
28 - 4000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
38.8
Hz
Mechanical quality factor
QMS
5.27
Electrical quality factor
QES
1.98
Total quality factor
QTS
1.44

Large signal parameters

Maximum linear excursion
xmax
2.5
mm
Air volume displaced at xmax
VD
132
cm³
Power handling
P
120
W
Program power
Pmax
240
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
7.0
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
38
mm
Winding material
Aluminum

Magnet

Force factor
Bl
7.47
N/A
Motor constant
Bl/√RE
2.82
N/√W
Weight
0.567
kg

Diaphragm

Effective diameter
259
mm
Effective area
SD
526
cm²
Moving mass
MMS
64.4
g
Moving mass (without air load)
MMD
56
g
Material
Poly

Suspensions

Stiffness
KMS
3.83
N/mm
Compliance
CMS
261
µm/N
Equivalent volume to the compliance
VAS
102
L
Mechanical resistance
RMS
2.98
N·s/m
Surround material
Rolled Foam

Dimensions

Nominal diameter
12
305
mm
Overall diameter
305
mm
Baffle cutout diameter
286
mm
Mounting depth
121
mm
Volume occupied by the driver (estimated)
0.89
L
Net weight
2.155
kg
Frame material
Stamped Steel
Goldwood GW-212/8 SPL & Impedance

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SD
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SD
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