Scan-Speak 18W/4531G01
Mid Bass
6.5″ / 180 mm
Nominal diameter
34 Hz
Resonance
0.35
Q factor
88 dB
Sensitivity
± 6.5 mm
Linear excursion
110 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.2
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
34.0
Hz
Mechanical quality factor
QMS
4.90
Electrical quality factor
QES
0.38
Total quality factor
QTS
0.35
Large signal parameters
Maximum linear excursion
xmax
6.5
mm
Maximum excursion before damage
xlim
11.0
mm
Air volume displaced at xmax
VD
102
cm³
Power handling
P
70
W
Program power
Pmax
110
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.5
Ω
Inductance (1kHz)
LE
0.27
mH
VC Diameter
38
mm
Winding height
HVC
18
mm
Magnet
Force factor
Bl
5.7
N/A
Motor constant
Bl/√RE
3.05
N/√W
Air gap height
HAG
5
mm
Material
Ferrite
Diaphragm
Effective diameter
142
mm
Effective area
SD
157
cm²
Moving mass
MMS
16.9
g
Moving mass (without air load)
MMD
15.4
g
Material
Wood Fibre
Suspensions
Stiffness
KMS
0.77
N/mm
Compliance
CMS
1300
µm/N
Equivalent volume to the compliance
VAS
45.6
L
Mechanical resistance
RMS
0.74
N·s/m
Surround material
SBR Rubber
Dimensions
Nominal diameter
6.5
″
180
mm
Volume occupied by the driver (estimated)
0.69
L
Net weight
1.7
kg
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SpeakerbenchSimilar woofers to Scan-Speak 18W/4531G01
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8″Subwoofer
fS
33 Hz
SD
227 cm²
30 - 1500 Hz
QTS
0.33
xmax
7.6 mm
SPL1W
89 dB
Bl/√RE
4.73
Pmax
250 W
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8″Subwoofer
fS
32 Hz
SD
227 cm²
20 - 2000 Hz
QTS
0.33
xmax
7.7 mm
SPL1W
89 dB
Bl/√RE
4.58
Pmax
320 W
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9″Woofer
fS
33 Hz
SD
213 cm²
32 - 2000 Hz
QTS
0.39
xmax
6.5 mm
SPL1W
88 dB
Bl/√RE
4.18
Pmax
300 W