4″ / 120 mm
Nominal diameter
52 Hz
Resonance
0.32
Q factor
87 dB
Sensitivity
± 3 mm
Linear excursion
70 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.8
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
52.0
Hz
Mechanical quality factor
QMS
3.42
Electrical quality factor
QES
0.35
Total quality factor
QTS
0.32
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Maximum excursion before damage
xlim
9.0
mm
Air volume displaced at xmax
VD
18
cm³
Power handling
P
40
W
Program power
Pmax
70
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
25
mm
Winding height
HVC
10
mm
Magnet
Force factor
Bl
5.4
N/A
Motor constant
Bl/√RE
2.26
N/√W
Air gap height
HAG
4
mm
Diaphragm
Effective diameter
86
mm
Effective area
SD
59
cm²
Moving mass
MMS
5.6
g
Moving mass (without air load)
MMD
5.2
g
Material
Coated NRSC Fibre Glass
Suspensions
Stiffness
KMS
0.6
N/mm
Compliance
CMS
1670
µm/N
Equivalent volume to the compliance
VAS
8.2
L
Mechanical resistance
RMS
0.54
N·s/m
Surround material
SBR Rubber
Dimensions
Nominal diameter
4
″
120
mm
Volume occupied by the driver (estimated)
0.4
L
Net weight
1.0
kg
Similar speaker drivers to Scan-Speak 12W/8524G00
4″Mid-range
fS
53 Hz
SD
55 cm²
53 - 8000 Hz
QTS
0.37
xmax
2.0 mm
SPL1W
86 dB
Bl/√RE
1.82
Pmax
60 W
4″Mid-range
fS
55 Hz
SD
55 cm²
55 - 8000 Hz
QTS
0.37
xmax
2.0 mm
SPL1W
86 dB
Bl/√RE
1.8
Pmax
60 W
4″Mid Bass
fS
50 Hz
SD
59 cm²
QTS
0.27
xmax
3.0 mm
SPL1W
87 dB
Bl/√RE
2.5
Pmax
70 W