Dayton Audio Ultimax UM12-22
Subwoofer
12″ / 315 mm
Nominal diameter
32 Hz
Resonance
0.77
Q factor
83 dB
Sensitivity
± 19 mm
Linear excursion
1200 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.1
dB
Frequency response
20 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
31.8
Hz
Mechanical quality factor
QMS
2.90
Electrical quality factor
QES
1.05
Total quality factor
QTS
0.77
Large signal parameters
Maximum linear excursion
xmax
19.0
mm
Air volume displaced at xmax
VD
933
cm³
Power handling
P
600
W
Program power
Pmax
1200
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.7
Ω
Inductance (1kHz, in series)
LE
0.78
mH
VC Diameter
64
mm
Winding material
Copper
Former material
Aluminum
Magnet
Force factor (in series)
Bl
12.0
N/A
Motor constant
Bl/√RE
6.24
N/√W
Material
Ferrite
Diaphragm
Effective diameter
250
mm
Effective area
SD
491
cm²
Moving mass
MMS
206
g
Moving mass (without air load)
MMD
198
g
Material
Nomex
Suspensions
Stiffness
KMS
8.33
N/mm
Compliance
CMS
120
µm/N
Equivalent volume to the compliance
VAS
41.1
L
Mechanical resistance
RMS
14.19
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
12
″
315
mm
Overall diameter
315
mm
Baffle cutout diameter
285
mm
Overall depth
158
mm
Volume occupied by the driver (estimated)
2.8
L
Frame material
Cast Aluminium
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SD
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SD
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