Scan-Speak Revelator 28W/4878T00

Subwoofer

12″ / 280 mm
Nominal diameter
18 Hz
Resonance
0.3
Q factor
85 dB
Sensitivity
± 14 mm
Linear excursion
500 W
Program Power
Scan-Speak 28W/4878T00 SubwooferScan-Speak 28W/4878T00 Subwoofer
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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
85.4
dB
Frequency response
18 - 1000
Hz

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, estimated)
LE
0.77
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

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
12
″
280
mm
Volume occupied by the driver
2.23
L
Net weight
7.5
kg
Frame material
Die cast Aluminium
SPL & Impedance
Scan-Speak 28W/4878T00 SPL & Impedance
Scan-Speak 28W/4878T00 Dimensions
DatasheetDatasheet

Export this driver to a simulation software:

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