Eminence 820H

Guitar Speaker

8″ / 203 mm
Nominal diameter
144 Hz
Resonance
0.88
Q factor
97 dB
Sensitivity
± 1.59 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
96.8
dB
Frequency response
80 - 4600
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
144
Hz
Mechanical quality factor
QMS
18.78
Electrical quality factor
QES
0.92
Total quality factor
QTS
0.88

Large signal parameters

Maximum linear excursion
xmax
1.59
mm
Air volume displaced at xmax
VD
37
cm³
Power handling
P
20
W
Program power
Pmax
40
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.6
Ω
Inductance (1kHz)
LE
0.33
mH
VC Diameter
25
mm
Winding material
Copper
Former material
Polyimide

Magnet

Force factor
Bl
5.74
N/A
Motor constant
Bl/√RE
3.01
N/√W
Air gap height
HAG
6.4
mm
Weight
0.425
kg
Material
Ferrite

Diaphragm

Effective diameter
171
mm
Effective area
SD
231
cm²
Moving mass
MMS
9
g
Moving mass (without air load)
MMD
6.5
g
Material
Paper

Suspensions

Stiffness
KMS
7.69
N/mm
Compliance
CMS
130
µm/N
Equivalent volume to the compliance
VAS
9.62
L
Mechanical resistance
RMS
0.43
N·s/m
Surround material
Full paper

Dimensions

Nominal diameter
8
203
mm
Overall diameter
209
mm
Baffle cutout diameter
181
mm
Overall depth
78
mm
Volume occupied by the driver
0.51
L
Net weight
1.41
kg
Frame material
Pressed steel
Eminence 820H SPL & Impedance

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