Dayton Audio Reference RS270-4
Woofer
10″ / 272 mm
Nominal diameter
21 Hz
Resonance
0.27
Q factor
86 dB
Sensitivity
± 6 mm
Linear excursion
200 W
Program Power
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
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.8
dB
Frequency response
21 - 2000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
20.9
Hz
Mechanical quality factor
QMS
1.33
Electrical quality factor
QES
0.35
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
208
cm³
Power handling
P
100
W
Program power
Pmax
200
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.9
Ω
Inductance (1kHz)
LE
0.57
mH
VC Diameter
51
mm
Magnet
Force factor
Bl
12.1
N/A
Motor constant
Bl/√RE
6.13
N/√W
Diaphragm
Effective diameter
210
mm
Effective area
SD
346
cm²
Moving mass
MMS
98.6
g
Moving mass (without air load)
MMD
93.7
g
Suspensions
Stiffness
KMS
1.7
N/mm
Compliance
CMS
590
µm/N
Equivalent volume to the compliance
VAS
98.6
L
Mechanical resistance
RMS
9.74
N·s/m
Dimensions
Nominal diameter
10
″
272
mm
Overall diameter
272
mm
Baffle cutout diameter
236
mm
Overall depth
113
mm
Volume occupied by the driver (estimated)
1.5
L
Frame material
Cast Aluminium
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8″Subwoofer
fS
22 Hz
SD
214 cm²
22 - 4000 Hz
QTS
0.22
xmax
3.8 mm
SPL1W
87 dB
Bl/√RE
4.88
Pmax
200 W
10″Subwoofer
fS
22 Hz
SD
363 cm²
20 - 1000 Hz
QTS
0.31
xmax
14.0 mm
SPL1W
87 dB
Bl/√RE
6.82
Pmax
500 W
10″Subwoofer
fS
21 Hz
SD
337 cm²
18 - 500 Hz
QTS
0.29
xmax
11.0 mm
SPL1W
86 dB
Bl/√RE
5.72
Pmax
400 W