8″ / 210 mm
Nominal diameter
68 Hz
Resonance
0.27
Q factor
94 dB
Sensitivity
± 6 mm
Linear excursion
500 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
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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.0
dB
Frequency response
70 - 18000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
68.0
Hz
Mechanical quality factor
QMS
4.70
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
132
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
4.9
Ω
Inductance (1kHz)
LE
0.9
mH
VC Diameter
51
mm
Winding height
HVC
17
mm
Winding material
Aluminium
Former material
Glass Fibre
Magnet
Flux density
B
1.15
T
Force factor
Bl
12.6
N/A
Motor constant
Bl/√RE
5.69
N/√W
Air gap height
HAG
8
mm
Diaphragm
Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
22
g
Moving mass (without air load)
MMD
19.5
g
Material
Waterproof Front Side
Suspensions
Stiffness
KMS
4.02
N/mm
Compliance
CMS
249
µm/N
Equivalent volume to the compliance
VAS
17
L
Mechanical resistance
RMS
2.0
N·s/m
Dimensions
Nominal diameter
8
″
210
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
111
mm
Flange thickness
10
mm
Mounting depth
101
mm
Volume occupied by the driver (estimated)
1.1
L
Net weight
2.6
kg
Similar speaker drivers to B&C Speaker 8CXN51
8″Mid Bass
fS
68 Hz
SD
220 cm²
70 - 4000 Hz
QTS
0.27
xmax
6.0 mm
SPL1W
94 dB
Bl/√RE
5.63
Pmax
400 W
8″Mid-range
fS
68 Hz
SD
200 cm²
65 - 3000 Hz
QTS
0.31
xmax
7.0 mm
SPL1W
93 dB
Bl/√RE
5.21
Pmax
400 W
10″Woofer
fS
71 Hz
SD
320 cm²
70 - 2500 Hz
QTS
0.29
xmax
6.5 mm
SPL1W
94 dB
Bl/√RE
8.13
Pmax
800 W