SEAS H1699-08/06 MR18REX/XF

Coaxial

8″ / 180 mm
Nominal diameter
126 Hz
Resonance
0.69
Q factor
90 dB
Sensitivity
± 3 mm
Linear excursion
250 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
90.4
dB
Frequency response
200 - 25000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
126
Hz
Mechanical quality factor
QMS
2.49
Electrical quality factor
QES
0.96
Total quality factor
QTS
0.69

Large signal parameters

Maximum linear excursion
xmax
3.0
mm
Maximum excursion before damage
xlim
6.0
mm
Air volume displaced at xmax
VD
38
cm³
Power handling
P
80
W
Program power
Pmax
250
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.2
Ω
Inductance (1kHz)
LE
0.43
mH
VC Diameter
39
mm
Winding height
HVC
12
mm

Magnet

Flux density
B
1.1
T
Force factor
Bl
8.3
N/A
Motor constant
Bl/√RE
3.33
N/√W
Air gap height
HAG
6
mm
Weight
0.64
kg

Diaphragm

Effective diameter
127
mm
Effective area
SD
126
cm²
Moving mass
MMS
11.8
g
Moving mass (without air load)
MMD
10.7
g

Suspensions

Stiffness
KMS
10.0
N/mm
Compliance
CMS
100
µm/N
Equivalent volume to the compliance
VAS
3
L
Mechanical resistance
RMS
4.26
N·s/m

Dimensions

Nominal diameter
8
180
mm
Volume occupied by the driver (estimated)
0.83
L
Net weight
2.02
kg
SEAS H1699-08/06 MR18REX/XF SPL & Impedance
SEAS H1699-08/06 MR18REX/XF Dimensions

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