BMS 8S219
Woofer
8″ / 203 mm
Nominal diameter
82 Hz
Resonance
0.41
Q factor
92 dB
Sensitivity
± 6.3 mm
Linear excursion
500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
92.4
dB
Frequency response
80 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
82.0
Hz
Mechanical quality factor
QMS
4.80
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.41
Large signal parameters
Maximum linear excursion
xmax
6.3
mm
Air volume displaced at xmax
VD
140
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz)
LE
0.52
mH
VC Diameter
52
mm
Winding height
HVC
19
mm
Winding material
Copper
Magnet
Force factor
Bl
13.3
N/A
Motor constant
Bl/√RE
5.52
N/√W
Air gap height
HAG
6.5
mm
Material
Ferrite
Diaphragm
Effective diameter
168
mm
Effective area
SD
222
cm²
Moving mass
MMS
26.6
g
Moving mass (without air load)
MMD
24.2
g
Suspensions
Stiffness
KMS
7.14
N/mm
Compliance
CMS
140
µm/N
Equivalent volume to the compliance
VAS
9.7
L
Mechanical resistance
RMS
2.86
N·s/m
Dimensions
Nominal diameter
8
″
203
mm
Volume occupied by the driver (estimated)
0.85
L
Frame material
Cast Aluminum
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SpeakerbenchSimilar woofers to BMS 8S219
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8″Low frequency
fS
85 Hz
SD
227 cm²
70 - 6000 Hz
QTS
0.44
xmax
6.0 mm
SPL1W
92 dB
Bl/√RE
4.98
Pmax
400 W
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8″Low frequency
fS
81 Hz
SD
214 cm²
80 - 5000 Hz
QTS
0.43
xmax
3.8 mm
SPL1W
92 dB
Bl/√RE
5.41
Pmax
500 W
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8″Woofer
fS
85 Hz
SD
217 cm²
80 - 6300 Hz
QTS
0.37
xmax
3.6 mm
SPL1W
93 dB
Bl/√RE
5.82
Pmax
400 W