Jensen Punch BP 15/250

Bass Guitar Speaker

15″ / 385 mm
Nominal diameter
47 Hz
Resonance
0.51
Q factor
95 dB
Sensitivity
± 3.4 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
94.9
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
47.0
Hz
Mechanical quality factor
QMS
4.26
Electrical quality factor
QES
0.58
Total quality factor
QTS
0.51

Large signal parameters

Maximum linear excursion
xmax
3.4
mm
Maximum excursion before damage
xlim
7.0
mm
Air volume displaced at xmax
VD
257
cm³
Power handling
P
250
W
Program power
Pmax
500
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.6
Ω
Inductance (1kHz)
LE
1.07
mH
VC Diameter
65
mm
Winding height
HVC
13
mm
Winding material
Copper
Former material
Aluminum

Magnet

Flux density
B
1.15
T
Force factor
Bl
15.31
N/A
Motor constant
Bl/√RE
5.96
N/√W
Air gap height
HAG
8
mm
Weight
1.45
kg
Material
Ferrite

Diaphragm

Effective diameter
310
mm
Effective area
SD
755
cm²
Moving mass
MMS
69.7
g
Moving mass (without air load)
MMD
54.6
g
Material
Paper

Suspensions

Stiffness
KMS
6.1
N/mm
Compliance
CMS
164
µm/N
Equivalent volume to the compliance
VAS
133
L
Mechanical resistance
RMS
4.83
N·s/m
Surround material
Treated Cloth

Dimensions

Nominal diameter
15
385
mm
Overall diameter
385
mm
Volume occupied by the driver (estimated)
2.4
L
Net weight
5.4
kg
Frame material
Pressed Sheet
Jensen BP 15/250 SPL & Impedance
Jensen BP 15/250 Dimensions

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