Jensen Punch BP 12/250

Bass Guitar Speaker

12″ / 318 mm
Nominal diameter
50 Hz
Resonance
0.32
Q factor
96 dB
Sensitivity
± 3.1 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
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
95.6
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
50.2
Hz
Mechanical quality factor
QMS
5.14
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.32

Large signal parameters

Maximum linear excursion
xmax
3.1
mm
Maximum excursion before damage
xlim
5.5
mm
Air volume displaced at xmax
VD
152
cm³
Power handling
P
250
W
Program power
Pmax
500
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.2
Ω
Inductance (1kHz)
LE
0.94
mH
VC Diameter
65
mm
Winding height
HVC
12
mm
Winding material
Copper
Former material
Kapton

Magnet

Flux density
B
1.15
T
Force factor
Bl
16.4
N/A
Motor constant
Bl/√RE
6.58
N/√W
Air gap height
HAG
10
mm
Weight
1.45
kg
Material
Ferrite

Diaphragm

Effective diameter
250
mm
Effective area
SD
491
cm²
Moving mass
MMS
46.6
g
Moving mass (without air load)
MMD
38.5
g
Material
Paper

Suspensions

Stiffness
KMS
4.63
N/mm
Compliance
CMS
216
µm/N
Equivalent volume to the compliance
VAS
73.5
L
Mechanical resistance
RMS
2.86
N·s/m
Surround material
Treated Cloth

Dimensions

Nominal diameter
12
318
mm
Overall diameter
318
mm
Volume occupied by the driver (estimated)
2.1
L
Net weight
4.8
kg
Frame material
Pressed Sheet
Jensen BP 12/250 SPL & Impedance
Jensen BP 12/250 Dimensions

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