Scan-Speak Revelator 28W/4878T01

Woofer

12″ / 280 mm
Nominal diameter
23 Hz
Resonance
0.26
Q factor
88 dB
Sensitivity
± 7 mm
Linear excursion
500 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
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
88.4
dB
Frequency response
23 - 1000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
23.0
Hz
Mechanical quality factor
QMS
6.21
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.26

Large signal parameters

Maximum linear excursion
xmax
7.0
mm
Maximum excursion before damage
xlim
28.0
mm
Air volume displaced at xmax
VD
254
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, estimated)
LE
0.65
mH
VC Diameter
75
mm
Winding height
HVC
22
mm
Former material
Titanium

Magnet

Force factor
Bl
12.0
N/A
Motor constant
Bl/√RE
6.82
N/√W
Air gap height
HAG
8
mm

Diaphragm

Effective diameter
215
mm
Effective area
SD
363
cm²
Moving mass
MMS
86
g
Moving mass (without air load)
MMD
80.8
g
Material
Paper sandwich

Suspensions

Stiffness
KMS
1.79
N/mm
Compliance
CMS
560
µm/N
Equivalent volume to the compliance
VAS
104
L
Mechanical resistance
RMS
2.0
N·s/m

Dimensions

Nominal diameter
12
280
mm
Volume occupied by the driver
2.23
L
Net weight
7.5
kg
Frame material
Die cast Aluminium
Scan-Speak 28W/4878T01 SPL & Impedance
Scan-Speak 28W/4878T01 Dimensions

Export this driver to a simulation software:

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Similar woofers to Scan-Speak 28W/4878T01

Morel TiCW 1058Ft Woofer
10Woofer
fS
25 Hz
SD
343 cm²
QTS
0.30
xmax
10.5 mm
SPL1W
88 dB
Bl/√RE
6.26
Pmax
1200 W