Scan-Speak 28W/4878T00
Subwoofer
11″ / 280 mm
Nominal diameter
18 Hz
Resonance
0.3
Q factor
85 dB
Sensitivity
± 14 mm
Linear excursion
500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.4
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
18.0
Hz
Mechanical quality factor
QMS
5.60
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.30
Large signal parameters
Maximum linear excursion
xmax
14.0
mm
Maximum excursion before damage
xlim
26.0
mm
Air volume displaced at xmax
VD
508
cm³
Power handling
P
200
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz)
LE
0.5
mH
VC Diameter
75
mm
Winding height
HVC
36
mm
Former material
Titanium
Magnet
Force factor
Bl
11.2
N/A
Motor constant
Bl/√RE
6.36
N/√W
Air gap height
HAG
8
mm
Material
Ferrite
Diaphragm
Effective diameter
215
mm
Effective area
SD
363
cm²
Moving mass
MMS
114.5
g
Moving mass (without air load)
MMD
109.3
g
Material
Paper sandwich
Suspensions
Stiffness
KMS
1.47
N/mm
Compliance
CMS
680
µm/N
Equivalent volume to the compliance
VAS
127
L
Mechanical resistance
RMS
2.3
N·s/m
Dimensions
Nominal diameter
11
″
280
mm
Volume occupied by the driver (estimated)
3.3
L
Net weight
7.5
kg
Frame material
Aluminium
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SpeakerbenchSimilar subwoofers to Scan-Speak 28W/4878T00
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fS
21 Hz
SD
352 cm²
QTS
0.31
xmax
12.5 mm
SPL1W
86 dB
Bl/√RE
6.51
Pmax
200 W
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10″Subwoofer
fS
21 Hz
SD
352 cm²
QTS
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xmax
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SPL1W
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Bl/√RE
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Pmax
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VOLT SB25508 Ω
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