PowerBass XL-840

4Ω
2x4Ω

Subwoofer

8″ / 203 mm
Nominal diameter
43 Hz
Resonance
0.46
Q factor
84 dB
Sensitivity
± 6 mm
Linear excursion
400 W
Program Power
PowerBass XL-840 Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
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
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
83.7
dB
Frequency response
43 - 500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
43.3
Hz
Mechanical quality factor
QMS
3.97
Electrical quality factor
QES
0.51
Total quality factor
QTS
0.46

Large signal parameters

Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
127
cm³
Power handling
P
200
W
Program power
Pmax
400
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.5
Ω
Inductance (1kHz, estimated)
LE
0.75
mH
VC Diameter
51
mm

Magnet

Force factor
Bl
12.83
N/A
Motor constant
Bl/√RE
6.86
N/√W
Weight
3.29
kg

Diaphragm

Effective diameter
164
mm
Effective area
SD
211
cm²
Moving mass
MMS
88.9
g
Moving mass (without air load)
MMD
86.7
g
Material
Non Pressed Paper

Suspensions

Stiffness
KMS
6.58
N/mm
Compliance
CMS
152
µm/N
Equivalent volume to the compliance
VAS
9.64
L
Mechanical resistance
RMS
6.09
N·s/m

Dimensions

Nominal diameter
8
″
203
mm
Baffle cutout diameter
181
mm
Mounting depth
111
mm
Volume occupied by the driver (estimated)
0.85
L
Impedance
Step response
Tone Burst

Export this driver to a simulation software:

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Similar subwoofers to PowerBass XL-840

PowerBass XL-840D Subwoofer
PowerBass  XL-840D2 x 4 Ω
8″Subwoofer
fS
43 Hz
SD
211 cm²
43 - 500 Hz
QTS
0.46
xmax
6.0 mm
SPL1W
83 dB
Bl/√RE
6.41
Pmax
400 W