4″ / 107 mm
Nominal diameter
81 Hz
Resonance
0.51
Q factor
86 dB
Sensitivity
± 2 mm
Linear excursion
80 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
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.4
dB
Frequency response
80 - 15000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
81.4
Hz
Mechanical quality factor
QMS
2.17
Electrical quality factor
QES
0.67
Total quality factor
QTS
0.51
Large signal parameters
Maximum linear excursion
xmax
2.0
mm
Air volume displaced at xmax
VD
11
cm³
Power handling
P
40
W
Program power
Pmax
80
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz)
LE
0.32
mH
VC Diameter
25
mm
Magnet
Force factor
Bl
3.3
N/A
Motor constant
Bl/√RE
1.82
N/√W
Diaphragm
Effective diameter
82
mm
Effective area
SD
53
cm²
Moving mass
MMS
4.2
g
Moving mass (without air load)
MMD
3.9
g
Suspensions
Stiffness
KMS
1.09
N/mm
Compliance
CMS
920
µm/N
Equivalent volume to the compliance
VAS
3.68
L
Mechanical resistance
RMS
0.99
N·s/m
Dimensions
Nominal diameter
4
″
107
mm
Overall diameter
107
mm
Baffle cutout diameter
60
mm
Overall depth
102
mm
Volume occupied by the driver (estimated)
0.37
L
Frame material
Stamped Steel
Similar speaker drivers to Dayton Audio PC105-4
4″Mid-range
fS
80 Hz
SD
55 cm²
80 - 5000 Hz
QTS
0.55
xmax
1.5 mm
SPL1W
86 dB
Bl/√RE
1.93
Pmax
80 W
5″Woofer
fS
76 Hz
SD
54 cm²
75 - 9200 Hz
QTS
0.50
xmax
2.8 mm
SPL1W
86 dB
Bl/√RE
1.99
Pmax
60 W
4″Mid-range
fS
85 Hz
SD
55 cm²
85 - 10000 Hz
QTS
0.43
xmax
1.5 mm
SPL1W
87 dB
Bl/√RE
1.91
Pmax
120 W