Specification
Nominal Basket Diameter
Nominal Impedance
Power Rating
8-3/16", 209mm
8-Ohms
80 Watts
Sound That Will Move You
Resonance
395Hz
Usable Frequency Range
Sensitivity
Magnet Weight
395Hz - 5kHz
96.3 dB
42.2 oz.
Voice Coil Diameter
1.5" 38.6mm
Thiele & Small Parameters
Resonant Frequency (fo)
DC resistance (Re)
Coil Inductance (Le)
Mechanical Q (Qms)
Electromagnetic Q (Qes)
Total Q (Qts)
395Hz ±15%
6.5 Ohms
367.888m mH
3.896
1.662
1.165
Compliance Equivalent Volume (Vas) .75 liters / .0624 cu.ft.
Mechanical Compliance of Suspension (Cms) 11.806mm/N
Earthquake EQ8S8 Pro Audio Series
BL Product (BL)
11.557 T-M
12.001 grams
1.6 mm
Diaphragm Mass (Mmd)
Maximum Linear Excursion (Xmax)
Surface Area of Cone (Sd)
dBSPL
Ohm
110
100
90
50
40
211.241 cm
Mounting Information
30
20
Recommended Enclosure Volume
Sealed
Vented
liters/ ft3
liters/ ft3
80
Overall Diameter
Cut Out Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Depth
8 3/16", 209mm
7 1/8", 181mm
fitted as standard
fitted as standard
4-5.5 x 10mm
2-15/16", 88mm
70
60
50
10
9
8
7
40
Materials of Construction
Copper voice coil
Polyimide former
Ferrite magnet
Vented and extended core
Stamped steel basket
Paper cone
30
6
20K
20 Hz
50
100
200
500
1K
2K
5K
10K
SPL vs Freq
Earthquake Sound Corporation
2727 McCone Avenue • Hayward, CA 94545 • phone: 800-576-7944
Cloth surround
Solid composition paper dust cap
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