Eminence DELTA PRO-8B

16Ω

Mid-range

8″ / 203 mm
Nominal diameter
71 Hz
Resonance
0.27
Q factor
96 dB
Sensitivity
± 3 mm
Linear excursion
450 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
95.6
dB
Frequency response
100 - 5000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
71.0
Hz
Mechanical quality factor
QMS
7.47
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.27

Large signal parameters

Maximum linear excursion
xmax
3.0
mm
Maximum excursion before damage
xlim
7.0
mm
Air volume displaced at xmax
VD
66
cm³
Power handling
P
225
W
Program power
Pmax
450
W

Voice Coil

Nominal impedance
Z
16
Ω
DC resistance
RE
10.5
Ω
Inductance (1kHz)
LE
0.9
mH
VC Diameter
51
mm
Winding material
Copper
Former material
Polyimide

Magnet

Force factor
Bl
17.6
N/A
Motor constant
Bl/√RE
5.43
N/√W
Air gap height
HAG
7.9
mm
Weight
1.673
kg
Material
Ferrite

Diaphragm

Effective diameter
167
mm
Effective area
SD
219
cm²
Moving mass
MMS
18
g
Moving mass (without air load)
MMD
15.4
g
Material
Paper

Suspensions

Stiffness
KMS
3.7
N/mm
Compliance
CMS
270
µm/N
Equivalent volume to the compliance
VAS
18.3
L
Mechanical resistance
RMS
1.07
N·s/m
Surround material
Cloth

Dimensions

Nominal diameter
8
203
mm
Overall diameter
238
mm
Baffle cutout diameter
187
mm
Overall depth
95
mm
Volume occupied by the driver
1.04
L
Net weight
4.54
kg
Frame material
Die-cast aluminum
Eminence DELTA PRO-8B SPL & Impedance

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