BMS 8C250
Coaxial
8″ / 205 mm
Nominal diameter
79 Hz
Resonance
0.52
Q factor
93 dB
Sensitivity
± 4.25 mm
Linear excursion
400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
92.5
dB
Frequency response
70 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
79.1
Hz
Mechanical quality factor
QMS
4.85
Electrical quality factor
QES
0.61
Total quality factor
QTS
0.52
Large signal parameters
Maximum linear excursion
xmax
4.25
mm
Air volume displaced at xmax
VD
85
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz, estimated)
LE
0.43
mH
VC Diameter
51
mm
Winding height
HVC
15
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
1.8
T
Force factor
Bl
9.95
N/A
Motor constant
Bl/√RE
4.28
N/√W
Air gap height
HAG
6.5
mm
Material
Ceramic
Diaphragm
Effective diameter
160
mm
Effective area
SD
201
cm²
Moving mass
MMS
18.3
g
Moving mass (without air load)
MMD
16.2
g
Material
Polyester
Suspensions
Stiffness
KMS
5.56
N/mm
Compliance
CMS
180
µm/N
Equivalent volume to the compliance
VAS
10.2
L
Mechanical resistance
RMS
1.88
N·s/m
Dimensions
Nominal diameter
8
″
205
mm
Overall diameter
205
mm
Baffle cutout diameter
182
mm
Overall depth
111
mm
Volume occupied by the driver (estimated)
1.1
L
Net weight
3.0
kg
Frame material
Cast Aluminum
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6″Mid Bass
fS
90 Hz
SD
155 cm²
80 - 5000 Hz
QTS
0.47
xmax
3.5 mm
SPL1W
93 dB
Bl/√RE
3.4
Pmax
300 W
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8″Coaxial
fS
89 Hz
SD
220 cm²
90 - 20000 Hz
QTS
0.55
xmax
6.0 mm
SPL1W
93 dB
Bl/√RE
4.21
Pmax
600 W