2.5″ / 68 mm
Nominal diameter
109 Hz
Resonance
0.64
Q factor
82 dB
Sensitivity
± 2 mm
Linear excursion
40 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
82.1
dB
Frequency response
110 - 17000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
109
Hz
Mechanical quality factor
QMS
2.27
Electrical quality factor
QES
0.88
Total quality factor
QTS
0.64
Large signal parameters
Maximum linear excursion
xmax
2.0
mm
Air volume displaced at xmax
VD
4.2
cm³
Power handling
P
20
W
Program power
Pmax
40
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.8
Ω
Inductance (1kHz)
LE
0.47
mH
VC Diameter
19
mm
Magnet
Force factor
Bl
3.3
N/A
Motor constant
Bl/√RE
1.27
N/√W
Diaphragm
Effective diameter
52
mm
Effective area
SD
21
cm²
Moving mass
MMS
2
g
Moving mass (without air load)
MMD
1.9
g
Suspensions
Stiffness
KMS
0.95
N/mm
Compliance
CMS
1050
µm/N
Equivalent volume to the compliance
VAS
1.3
L
Mechanical resistance
RMS
0.6
N·s/m
Dimensions
Nominal diameter
2.5
″
68
mm
Overall diameter
68
mm
Baffle cutout diameter
64
mm
Overall depth
37
mm
Frame material
Stamped Steel
Similar speaker drivers to Dayton Audio PC68-8
2.5″Full-range
fS
109 Hz
SD
25 cm²
85 - 13000 Hz
QTS
0.63
xmax
4.0 mm
SPL1W
82 dB
Bl/√RE
1.76
Pmax
40 W
2.5″Full-range
fS
115 Hz
SD
20 cm²
QTS
0.68
xmax
2.7 mm
SPL1W
81 dB
Bl/√RE
1.53
Pmax
40 W
2.5″Full-range
fS
110 Hz
SD
21 cm²
80 - 16000 Hz
QTS
0.75
xmax
3.4 mm
SPL1W
82 dB
Bl/√RE
1.37
Pmax
50 W