Jensen Blackbird P 12/40 BB
8Ω
16ΩGuitar Speaker
12″ / 307 mm
Nominal diameter
93 Hz
Resonance
1.36
Q factor
97 dB
Sensitivity
80 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.6
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
93.2
Hz
Mechanical quality factor
QMS
14.29
Electrical quality factor
QES
1.50
Total quality factor
QTS
1.36
Large signal parameters
Power handling
P
40
W
Program power
Pmax
80
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.9
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
32
mm
Winding height
HVC
9
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
1.28
T
Force factor
Bl
8.2
N/A
Motor constant
Bl/√RE
3.38
N/√W
Air gap height
HAG
6
mm
Weight
0.3
kg
Material
Reinforced Alnico
Diaphragm
Effective diameter
250
mm
Effective area
SD
491
cm²
Moving mass
MMS
28.7
g
Moving mass (without air load)
MMD
20.8
g
Material
Paper
Suspensions
Stiffness
KMS
9.8
N/mm
Compliance
CMS
102
µm/N
Equivalent volume to the compliance
VAS
34.6
L
Mechanical resistance
RMS
1.18
N·s/m
Surround material
Integrated Paper
Dimensions
Nominal diameter
12
″
307
mm
Overall diameter
307
mm
Volume occupied by the driver (estimated)
0.82
L
Net weight
2.0
kg
Frame material
Pressed Sheet
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Similar speaker drivers to Jensen P 12/40 BB
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10″Guitar Speaker
fS
95 Hz
SD
345 cm²
100 - 5000 Hz
QTS
1.47
xmax
2.1 mm
SPL1W
97 dB
Bl/√RE
2.37
Pmax
70 W
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12″Guitar Speaker
fS
91 Hz
SD
520 cm²
80 - 6200 Hz
QTS
1.29
xmax
0.5 mm
SPL1W
97 dB
Bl/√RE
3.57
Pmax
150 W
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Beyma 12GA508 Ω
12″Full-range
fS
90 Hz
SD
530 cm²
100 - 18000 Hz
QTS
1.16
xmax
3.0 mm
SPL1W
96 dB
Bl/√RE
4.02
Pmax
500 W