Dayton Audio Odeum Apollo 12LF

Woofer

12″ / 320 mm
Nominal diameter
28 Hz
Resonance
0.21
Q factor
93 dB
Sensitivity
± 9.25 mm
Linear excursion
800 W
Program Power
Dayton Audio Apollo 12LF WooferDayton Audio Apollo 12LF WooferDayton Audio Apollo 12LF Woofer
Excursion
Velocity
SPL
Phase
Group delay
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
93.0
dB
Frequency response
30 - 1500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
28.0
Hz
Mechanical quality factor
QMS
5.19
Electrical quality factor
QES
0.22
Total quality factor
QTS
0.21

Large signal parameters

Maximum linear excursion
xmax
9.25
mm
Air volume displaced at xmax
VD
493
cm³
Power handling
P
400
W
Program power
Pmax
800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.7
Ω
Inductance (1kHz)
LE
1.47
mH
VC Diameter
76
mm
Winding material
Copper
Former material
Glass Fiber

Magnet

Force factor
Bl
21.8
N/A
Motor constant
Bl/√RE
8.42
N/√W
Material
Ferrite

Diaphragm

Effective diameter
261
mm
Effective area
SD
533
cm²
Moving mass
MMS
88.3
g
Moving mass (without air load)
MMD
79.4
g
Material
Treated Paper

Suspensions

Stiffness
KMS
2.7
N/mm
Compliance
CMS
370
µm/N
Equivalent volume to the compliance
VAS
148
L
Mechanical resistance
RMS
2.99
N·s/m
Surround material
Cloth

Dimensions

Nominal diameter
12
″
320
mm
Overall diameter
320
mm
Baffle cutout diameter
292
mm
Overall depth
152
mm
Volume occupied by the driver (estimated)
2.7
L
Frame material
Cast Aluminium
Impedance
Step response
Tone Burst

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