8″ / 216 mm
Nominal diameter
31 Hz
Resonance
0.39
Q factor
86 dB
Sensitivity
± 6 mm
Linear excursion
160 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
31 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
31.0
Hz
Mechanical quality factor
QMS
3.10
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.39
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
125
cm³
Power handling
P
80
W
Program power
Pmax
160
W
Voice Coil
Nominal impedance
Z
2 x 8
Ω
DC resistance (in series)
RE
12.8
Ω
Inductance (1kHz, in series)
LE
4.64
mH
VC Diameter
39
mm
Magnet
Force factor (in series)
Bl
15.4
N/A
Motor constant
Bl/√RE
4.3
N/√W
Diaphragm
Effective diameter
163
mm
Effective area
SD
209
cm²
Moving mass
MMS
42.4
g
Moving mass (without air load)
MMD
40.1
g
Suspensions
Stiffness
KMS
1.61
N/mm
Compliance
CMS
620
µm/N
Equivalent volume to the compliance
VAS
38.2
L
Mechanical resistance
RMS
2.66
N·s/m
Dimensions
Nominal diameter
8
″
216
mm
Overall diameter
216
mm
Baffle cutout diameter
180
mm
Overall depth
95
mm
Volume occupied by the driver (estimated)
0.86
L
Similar subwoofers to Dayton Audio SD215A-88
10″Subwoofer
fS
33 Hz
SD
330 cm²
33 - 500 Hz
QTS
0.39
xmax
11.0 mm
SPL1W
86 dB
Bl/√RE
7.19
Pmax
700 W
10″Subwoofer
fS
26 Hz
SD
346 cm²
QTS
0.43
xmax
12.5 mm
SPL1W
85 dB
Bl/√RE
5.87
Pmax
1000 W
8.5″Woofer
fS
30 Hz
SD
206 cm²
30 - 500 Hz
QTS
0.44
xmax
10.0 mm
SPL1W
85 dB
Bl/√RE
4.65
Pmax
400 W