Dayton Audio Ultimax UM18-22

Subwoofer

18″ / 462 mm
Nominal diameter
26 Hz
Resonance
0.7
Q factor
87 dB
Sensitivity
± 22 mm
Linear excursion
2000 W
Program Power
Discontinued
Dayton Audio UM18-22 SubwooferDayton Audio UM18-22 SubwooferDayton Audio UM18-22 Subwoofer
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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
86.8
dB
Frequency response
19 - 500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
26.2
Hz
Mechanical quality factor
QMS
4.05
Electrical quality factor
QES
0.85
Total quality factor
QTS
0.70

Large signal parameters

Maximum linear excursion
xmax
22.0
mm
Air volume displaced at xmax
VD
2682
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W

Voice Coil

Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
4.3
Ω
Inductance (1kHz, in series)
LE
1.5
mH
VC Diameter
75
mm

Magnet

Force factor (in series)
Bl
21.1
N/A
Motor constant
Bl/√RE
10.2
N/√W
Material
Ferrite

Diaphragm

Effective diameter
394
mm
Effective area
SD
1219
cm²
Moving mass
MMS
532
g
Moving mass (without air load)
MMD
502.4
g
Material
Nomex

Suspensions

Stiffness
KMS
14.29
N/mm
Compliance
CMS
70
µm/N
Equivalent volume to the compliance
VAS
145
L
Mechanical resistance
RMS
21.62
N·s/m
Surround material
Rubber

Dimensions

Nominal diameter
18
″
462
mm
Overall diameter
462
mm
Baffle cutout diameter
426
mm
Overall depth
248
mm
Volume occupied by the driver (estimated)
8.5
L
Frame material
Cast Aluminium
Impedance
SPL
Dayton Audio UM18-22 Impedance
Dayton Audio UM18-22 SPL
Dayton Audio UM18-22 Dimensions
DatasheetDatasheet

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