8″ / 203 mm
Nominal diameter
51 Hz
Resonance
0.64
Q factor
83 dB
Sensitivity
± 7 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.0
dB
Frequency response
50 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
51.1
Hz
Mechanical quality factor
QMS
4.29
Electrical quality factor
QES
0.75
Total quality factor
QTS
0.64
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Air volume displaced at xmax
VD
139
cm³
Power handling
P
150
W
Program power
Pmax
300
W
Voice Coil
Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
7.1
Ω
Inductance (1kHz, in series, estimated)
LE
1.3
mH
VC Diameter
51
mm
Magnet
Force factor (in series)
Bl
13.8
N/A
Motor constant
Bl/√RE
5.18
N/√W
Diameter
120
mm
Diaphragm
Effective diameter
159
mm
Effective area
SD
198
cm²
Moving mass
MMS
69.3
g
Moving mass (without air load)
MMD
67.2
g
Suspensions
Stiffness
KMS
7.14
N/mm
Compliance
CMS
140
µm/N
Equivalent volume to the compliance
VAS
7.8
L
Mechanical resistance
RMS
5.3
N·s/m
Dimensions
Nominal diameter
8
″
203
mm
Baffle cutout diameter
182
mm
Mounting depth
106
mm
Volume occupied by the driver
0.5
L
Similar subwoofers to Skar Audio IX-8 D4
8″Subwoofer
fS
48 Hz
SD
202 cm²
50 - 1000 Hz
QTS
0.66
xmax
7.0 mm
SPL1W
83 dB
Bl/√RE
5.23
Pmax
300 W
8″Shallow subwoofer
fS
43 Hz
SD
222 cm²
QTS
0.51
xmax
6.0 mm
SPL1W
84 dB
Bl/√RE
6.27
Pmax
600 W
10″Subwoofer
fS
45 Hz
SD
314 cm²
44 - 400 Hz
QTS
0.62
xmax
24.0 mm
SPL1W
81 dB
Bl/√RE
8.92
Pmax
2000 W