10″ / 250 mm
Nominal diameter
59 Hz
Resonance
0.28
Q factor
96 dB
Sensitivity
± 2.5 mm
Linear excursion
400 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
96.4
dB
Frequency response
40 - 4500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
59.0
Hz
Mechanical quality factor
QMS
4.88
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
2.5
mm
Maximum excursion before damage
xlim
12.5
mm
Air volume displaced at xmax
VD
84
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
0.8
mH
VC Diameter
50
mm
Magnet
Force factor
Bl
12.4
N/A
Motor constant
Bl/√RE
5.46
N/√W
Weight
3.8
kg
Diaphragm
Effective diameter
207
mm
Effective area
SD
337
cm²
Moving mass
MMS
24
g
Moving mass (without air load)
MMD
19.1
g
Suspensions
Stiffness
KMS
3.23
N/mm
Compliance
CMS
310
µm/N
Equivalent volume to the compliance
VAS
49
L
Mechanical resistance
RMS
1.82
N·s/m
Dimensions
Nominal diameter
10
″
250
mm
Overall diameter
285
mm
Baffle cutout diameter
245
mm
Overall depth
119
mm
Flange thickness
9
mm
Mounting depth
110
mm
Volume occupied by the driver
1.1
L
Net weight
4.9
kg
Frame material
Diecast Aluminum
Similar woofers to VOLT BM251.4
10″Woofer
fS
58 Hz
SD
400 cm²
45 - 3000 Hz
QTS
0.31
xmax
7.0 mm
SPL1W
96 dB
Bl/√RE
6.51
Pmax
600 W
12″Subwoofer
fS
55 Hz
SD
531 cm²
50 - 4600 Hz
QTS
0.27
xmax
7.0 mm
SPL1W
97 dB
Bl/√RE
8.41
Pmax
1200 W
12″Low frequency
fS
57 Hz
SD
531 cm²
50 - 3000 Hz
QTS
0.32
xmax
7.5 mm
SPL1W
96 dB
Bl/√RE
8.13
Pmax
1000 W