12″ / 318 mm
Nominal diameter
39 Hz
Resonance
0.29
Q factor
93 dB
Sensitivity
± 8 mm
Linear excursion
2200 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
93.0
dB
Frequency response
40 - 1700
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
39.0
Hz
Mechanical quality factor
QMS
4.60
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
425
cm³
Power handling
P
1100
W
Program power
Pmax
2200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.66
mH
VC Diameter
102
mm
Winding height
HVC
26
mm
Magnet
Force factor
Bl
20.4
N/A
Motor constant
Bl/√RE
8.54
N/√W
Air gap height
HAG
10
mm
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
92
g
Moving mass (without air load)
MMD
83.2
g
Suspensions
Stiffness
KMS
5.56
N/mm
Compliance
CMS
180
µm/N
Equivalent volume to the compliance
VAS
71
L
Mechanical resistance
RMS
4.9
N·s/m
Dimensions
Nominal diameter
12
″
318
mm
Overall diameter
318
mm
Baffle cutout diameter
283
mm
Overall depth
151
mm
Volume occupied by the driver (estimated)
2.5
L
Net weight
5.1
kg
Frame material
Cast Aluminum
Similar subwoofers to BMS 12N804
10″Subwoofer
fS
39 Hz
SD
377 cm²
47 - 2000 Hz
QTS
0.28
xmax
7.2 mm
SPL1W
93 dB
Bl/√RE
6.18
Pmax
1200 W
12″Woofer
fS
42 Hz
SD
515 cm²
35 - 1000 Hz
QTS
0.32
xmax
14.3 mm
SPL1W
93 dB
Bl/√RE
8.25
Pmax
1200 W
12″Woofer
fS
35 Hz
SD
515 cm²
35 - 2500 Hz
QTS
0.27
xmax
11.0 mm
SPL1W
93 dB
Bl/√RE
8.67
Pmax
1600 W