SEAS H1304-08 MCA12RC

Mid-range

4.5″ / 120 mm
Nominal diameter
68 Hz
Resonance
0.56
Q factor
85 dB
Sensitivity
± 0.9 mm
Linear excursion
400 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
Discard
Apply
Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.2
dB
Frequency response
400 - 5000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
68.0
Hz
Mechanical quality factor
QMS
2.42
Electrical quality factor
QES
0.74
Total quality factor
QTS
0.56

Large signal parameters

Maximum linear excursion
xmax
0.9
mm
Air volume displaced at xmax
VD
5.0
cm³
Power handling
P
110
W
Program power
Pmax
400
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.3
Ω
Inductance (1kHz)
LE
0.31
mH
VC Diameter
26
mm
Winding height
HVC
5.8
mm

Magnet

Flux density
B
1.1
T
Force factor
Bl
4.2
N/A
Motor constant
Bl/√RE
1.67
N/√W
Air gap height
HAG
4
mm
Weight
0.25
kg

Diaphragm

Effective diameter
84
mm
Effective area
SD
55
cm²
Moving mass
MMS
4.6
g
Moving mass (without air load)
MMD
4.3
g

Suspensions

Stiffness
KMS
0.83
N/mm
Compliance
CMS
1200
µm/N
Equivalent volume to the compliance
VAS
5
L
Mechanical resistance
RMS
0.85
N·s/m

Dimensions

Nominal diameter
4.5
120
mm
Volume occupied by the driver (estimated)
0.25
L
Net weight
0.66
kg
SEAS H1304-08 MCA12RC SPL & Impedance
SEAS H1304-08 MCA12RC Dimensions

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