B&C Speaker 18PS76
Low frequency
18″ / 460 mm
Nominal diameter
39 Hz
Resonance
0.27
Q factor
98 dB
Sensitivity
± 7 mm
Linear excursion
1200 W
Program Power
Discontinued
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Available on (affiliate link)
Parts Express
$$$
Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
97.7
dB
Frequency response
40 - 2000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
39.0
Hz
Mechanical quality factor
QMS
6.10
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Air volume displaced at xmax
VD
847
cm³
Power handling
P
600
W
Program power
Pmax
1200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
1.9
mH
VC Diameter
76
mm
Winding height
HVC
24
mm
Winding material
Copper
Former material
Glass Fibre
Magnet
Flux density
B
1.25
T
Force factor
Bl
25.8
N/A
Motor constant
Bl/√RE
11.5
N/√W
Air gap height
HAG
11
mm
Material
Ferrite
Diaphragm
Effective diameter
393
mm
Effective area
SD
1210
cm²
Moving mass
MMS
149
g
Moving mass (without air load)
MMD
119.8
g
Suspensions
Stiffness
KMS
10.0
N/mm
Compliance
CMS
100
µm/N
Equivalent volume to the compliance
VAS
207
L
Mechanical resistance
RMS
5.99
N·s/m
Spider material
Double Silicone
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
460
mm
Baffle cutout diameter
422
mm
Overall depth
202
mm
Flange thickness
16
mm
Mounting depth
186
mm
Volume occupied by the driver
9.0
L
Net weight
10.7
kg
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