8″ / 220 mm
Nominal diameter
27 Hz
Resonance
0.25
Q factor
90 dB
Sensitivity
± 5 mm
Linear excursion
300 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
Available on (affiliate link)
Parts Express
$$$
Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
89.9
dB
Frequency response
25 - 4500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
26.9
Hz
Mechanical quality factor
QMS
7.14
Electrical quality factor
QES
0.26
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
108
cm³
Power handling
P
150
W
Program power
Pmax
300
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.1
Ω
Inductance (1kHz)
LE
0.7
mH
VC Diameter
54
mm
Magnet
Force factor
Bl
10.0
N/A
Motor constant
Bl/√RE
4.05
N/√W
Diaphragm
Effective diameter
166
mm
Effective area
SD
216
cm²
Moving mass
MMS
25.2
g
Moving mass (without air load)
MMD
22.8
g
Suspensions
Stiffness
KMS
0.72
N/mm
Compliance
CMS
1390
µm/N
Equivalent volume to the compliance
VAS
91.4
L
Mechanical resistance
RMS
0.6
N·s/m
Dimensions
Nominal diameter
8
″
220
mm
Overall diameter
220
mm
Baffle cutout diameter
191
mm
Overall depth
115
mm
Volume occupied by the driver (estimated)
1.1
L
Frame material
Cast Aluminium
Similar woofers to Dayton Audio E220CF-8
8″Woofer
fS
27 Hz
SD
216 cm²
QTS
0.30
xmax
6.5 mm
SPL1W
89 dB
Bl/√RE
3.8
Pmax
120 W
8.5″Mid Bass
fS
30 Hz
SD
224 cm²
QTS
0.26
xmax
6.0 mm
SPL1W
90 dB
Bl/√RE
4.35
Pmax
300 W
8″Subwoofer
fS
29 Hz
SD
220 cm²
29 - 4000 Hz
QTS
0.29
xmax
4.0 mm
SPL1W
90 dB
Bl/√RE
3.27
Pmax
250 W