Dayton Audio Ultimax UM15-22
Subwoofer
15″ / 388 mm
Nominal diameter
28 Hz
Resonance
0.71
Q factor
86 dB
Sensitivity
± 19 mm
Linear excursion
1600 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.7
dB
Frequency response
20 - 500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
28.4
Hz
Mechanical quality factor
QMS
2.80
Electrical quality factor
QES
0.95
Total quality factor
QTS
0.71
Large signal parameters
Maximum linear excursion
xmax
19.0
mm
Air volume displaced at xmax
VD
1548
cm³
Power handling
P
800
W
Program power
Pmax
1600
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.7
Ω
Inductance (1kHz, in series)
LE
0.8
mH
VC Diameter
64
mm
Winding material
Copper
Former material
Aluminum
Magnet
Force factor (in series)
Bl
14.1
N/A
Motor constant
Bl/√RE
7.33
N/√W
Material
Ferrite
Diaphragm
Effective diameter
322
mm
Effective area
SD
815
cm²
Moving mass
MMS
287
g
Moving mass (without air load)
MMD
270.4
g
Material
Nomex
Suspensions
Stiffness
KMS
9.09
N/mm
Compliance
CMS
110
µm/N
Equivalent volume to the compliance
VAS
102
L
Mechanical resistance
RMS
18.29
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
15
″
388
mm
Overall diameter
388
mm
Baffle cutout diameter
351
mm
Overall depth
192
mm
Volume occupied by the driver (estimated)
4.8
L
Frame material
Cast Aluminium
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SD
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SD
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