12″ / 307 mm
Nominal diameter
90 Hz
Resonance
1.63
Q factor
97 dB
Sensitivity
80 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
97.1
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
90.1
Hz
Mechanical quality factor
QMS
13.97
Electrical quality factor
QES
1.85
Total quality factor
QTS
1.63
Large signal parameters
Power handling
P
40
W
Program power
Pmax
80
W
Voice Coil
Nominal impedance
Z
16
Ω
DC resistance
RE
12.0
Ω
Inductance (1kHz)
LE
0.72
mH
VC Diameter
32
mm
Winding height
HVC
9
mm
Magnet
Flux density
B
1.28
T
Force factor
Bl
10.06
N/A
Motor constant
Bl/√RE
2.9
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
27.4
g
Moving mass (without air load)
MMD
19.5
g
Suspensions
Stiffness
KMS
8.77
N/mm
Compliance
CMS
114
µm/N
Equivalent volume to the compliance
VAS
39
L
Mechanical resistance
RMS
1.11
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
Similar speaker drivers to Jensen P 12/40 BB
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
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
12″Guitar Speaker
fS
90 Hz
SD
491 cm²
QTS
1.92
xmax
1.5 mm
SPL1W
97 dB
Bl/√RE
2.84
Pmax
70 W