Scan-Speak Revelator 18M/4631T00

Mid-range

8″ / 180 mm
Nominal diameter
65 Hz
Resonance
0.6
Q factor
89 dB
Sensitivity
± 3 mm
Linear excursion
250 W
Program Power
Scan-Speak 18M/4631T00 Mid-rangeScan-Speak 18M/4631T00 Mid-range
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
89.3
dB
Frequency response
70 - 6000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
65.0
Hz
Mechanical quality factor
QMS
5.65
Electrical quality factor
QES
0.67
Total quality factor
QTS
0.60

Large signal parameters

Maximum linear excursion
xmax
3.0
mm
Maximum excursion before damage
xlim
14.5
mm
Air volume displaced at xmax
VD
46
cm³
Power handling
P
120
W
Program power
Pmax
250
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.5
Ω
Inductance (1kHz, estimated)
LE
0.24
mH
VC Diameter
38
mm
Winding height
HVC
11
mm
Former material
Titanium

Magnet

Force factor
Bl
5.6
N/A
Motor constant
Bl/√RE
2.99
N/√W
Air gap height
HAG
5
mm

Diaphragm

Effective diameter
138
mm
Effective area
SD
154
cm²
Moving mass
MMS
14.3
g
Moving mass (without air load)
MMD
12.9
g
Material
Sliced

Suspensions

Stiffness
KMS
2.38
N/mm
Compliance
CMS
420
µm/N
Equivalent volume to the compliance
VAS
14
L
Mechanical resistance
RMS
1.03
N·s/m
Surround material
Coated Foam

Dimensions

Nominal diameter
8
″
180
mm
Volume occupied by the driver
0.47
L
Net weight
1.7
kg
SPL & Impedance
Scan-Speak 18M/4631T00 SPL & Impedance
Scan-Speak 18M/4631T00 Dimensions
DatasheetDatasheet

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