Scan-Speak 18W/8535-01
Mid Bass
6.5″ / 180 mm
Nominal diameter
25 Hz
Resonance
0.38
Q factor
85 dB
Sensitivity
± 5 mm
Linear excursion
170 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.4
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
25.0
Hz
Mechanical quality factor
QMS
2.10
Electrical quality factor
QES
0.46
Total quality factor
QTS
0.38
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Maximum excursion before damage
xlim
10.0
mm
Air volume displaced at xmax
VD
73
cm³
Power handling
P
70
W
Program power
Pmax
170
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.9
Ω
Inductance (1kHz)
LE
0.33
mH
VC Diameter
38
mm
Winding height
HVC
15
mm
Magnet
Force factor
Bl
5.9
N/A
Motor constant
Bl/√RE
2.44
N/√W
Air gap height
HAG
5
mm
Diaphragm
Effective diameter
136
mm
Effective area
SD
145
cm²
Moving mass
MMS
17.2
g
Moving mass (without air load)
MMD
15.9
g
Material
Coated Air Dried Paper/Carbon Fibre
Suspensions
Stiffness
KMS
0.44
N/mm
Compliance
CMS
2300
µm/N
Equivalent volume to the compliance
VAS
68.9
L
Mechanical resistance
RMS
1.33
N·s/m
Surround material
SBR Rubber
Dimensions
Nominal diameter
6.5
″
180
mm
Volume occupied by the driver (estimated)
0.44
L
Net weight
1.1
kg
Frame material
Aluminium
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QSpeakers
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SpeakerbenchSimilar woofers to Scan-Speak 18W/8535-01
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8″Mid-range
fS
28 Hz
SD
207 cm²
28 - 4500 Hz
QTS
0.38
xmax
4.8 mm
SPL1W
86 dB
Bl/√RE
3.98
Pmax
120 W
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8″Woofer
fS
28 Hz
SD
214 cm²
28 - 2400 Hz
QTS
0.38
xmax
7.0 mm
SPL1W
86 dB
Bl/√RE
3.55
Pmax
160 W