12″ / 320 mm
Nominal diameter
27 Hz
Resonance
0.64
Q factor
85 dB
Sensitivity
± 17 mm
Linear excursion
1300 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
84.6
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
26.7
Hz
Mechanical quality factor
QMS
11.40
Electrical quality factor
QES
0.68
Total quality factor
QTS
0.64
Large signal parameters
Maximum linear excursion
xmax
17.0
mm
Air volume displaced at xmax
VD
833
cm³
Power handling
P
450
W
Program power
Pmax
1300
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
4.0
Ω
Inductance (1kHz, in series, estimated)
LE
1.32
mH
Magnet
Force factor (in series)
Bl
13.1
N/A
Motor constant
Bl/√RE
6.55
N/√W
Diameter
166
mm
Diaphragm
Effective diameter
250
mm
Effective area
SD
490
cm²
Moving mass
MMS
180.2
g
Moving mass (without air load)
MMD
172.1
g
Suspensions
Stiffness
KMS
5.08
N/mm
Compliance
CMS
197
µm/N
Equivalent volume to the compliance
VAS
67
L
Mechanical resistance
RMS
2.65
N·s/m
Dimensions
Nominal diameter
12
″
320
mm
Overall diameter
320
mm
Baffle cutout diameter
272
mm
Mounting depth
144
mm
Volume occupied by the driver
2.5
L
Net weight
7.7
kg
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QSpeakers
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MTX Audio RT12-442 x 4 Ω
12″Subwoofer
fS
28 Hz
SD
510 cm²
28 - 200 Hz
QTS
0.70
xmax
16.0 mm
SPL1W
85 dB
Bl/√RE
6.19
Pmax
750 W
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