Ciare HM087

Mid-range

3.5″ / 87 mm
Nominal diameter
270 Hz
Resonance
1.39
Q factor
89 dB
Sensitivity
± 2.1 mm
Linear excursion
90 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
88.5
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
270
Hz
Mechanical quality factor
QMS
4.40
Electrical quality factor
QES
2.02
Total quality factor
QTS
1.39

Large signal parameters

Maximum linear excursion
xmax
2.1
mm
Air volume displaced at xmax
VD
7.4
cm³
Power handling
P
30
W
Program power
Pmax
90
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
7.3
Ω
Inductance (1kHz)
LE
0.2
mH
VC Diameter
20
mm
Winding height
HVC
6.2
mm
Former material
Aluminum

Magnet

Force factor
Bl
4.14
N/A
Motor constant
Bl/√RE
1.53
N/√W
Air gap height
HAG
4
mm

Diaphragm

Effective diameter
67
mm
Effective area
SD
35
cm²
Moving mass
MMS
2.8
g
Moving mass (without air load)
MMD
2.6
g
Material
Treated Cellulose

Suspensions

Stiffness
KMS
8.33
N/mm
Compliance
CMS
120
µm/N
Equivalent volume to the compliance
VAS
0.2
L
Mechanical resistance
RMS
1.08
N·s/m
Surround material
Doped fabric

Dimensions

Nominal diameter
3.5
87
mm
Overall diameter
87
mm
Baffle cutout diameter
77
mm
Overall depth
42
mm
Flange thickness
5
mm
Mounting depth
37
mm
Volume occupied by the driver (estimated)
0.11
L
Net weight
0.37
kg
Frame material
Steel
Ciare HM087 SPL & Impedance
Ciare HM087 Dimensions

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fS
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SD
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QTS
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xmax
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SPL1W
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Bl/√RE
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Pmax
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