RCF MB8N251
Woofer
8″ / 203 mm
Nominal diameter
68 Hz
Resonance
0.25
Q factor
93 dB
Sensitivity
± 5 mm
Linear excursion
600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
92.9
dB
Frequency response
60 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
68.0
Hz
Mechanical quality factor
QMS
4.60
Electrical quality factor
QES
0.26
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Maximum excursion before damage
xlim
20.0
mm
Air volume displaced at xmax
VD
100
cm³
Power handling
P
300
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
1.3
mH
VC Diameter
63
mm
Winding height
HVC
14
mm
Winding material
Aluminium
Former material
Glass Fiber
Magnet
Force factor
Bl
15.2
N/A
Motor constant
Bl/√RE
6.73
N/√W
Air gap height
HAG
9
mm
Diaphragm
Effective diameter
165
mm
Effective area
SD
200
cm²
Moving mass
MMS
27
g
Moving mass (without air load)
MMD
24.9
g
Suspensions
Stiffness
KMS
5.03
N/mm
Compliance
CMS
199
µm/N
Equivalent volume to the compliance
VAS
13
L
Mechanical resistance
RMS
2.51
N·s/m
Dimensions
Nominal diameter
8
″
203
mm
Overall diameter
208
mm
Baffle cutout diameter
185
mm
Overall depth
102
mm
Volume occupied by the driver
0.6
L
Net weight
2.01
kg
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SpeakerbenchSimilar woofers to RCF MB8N251
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8″Mid-range
fS
71 Hz
SD
202 cm²
65 - 3000 Hz
QTS
0.25
xmax
5.3 mm
SPL1W
94 dB
Bl/√RE
6.28
Pmax
400 W
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6.5″Mid Bass
fS
75 Hz
SD
132 cm²
75 - 5000 Hz
QTS
0.30
xmax
6.0 mm
SPL1W
92 dB
Bl/√RE
4.65
Pmax
300 W