Specification
Nominal Basket Diameter
Nominal Impedance
Power Rating
Resonance
Usable Frequency Range
Sensitivity
Magnet Weight
Voice Coil Diameter
8", 203.2mm
4-Ohms
80 Watts
68Hz ±15%
68Hz - 10kHz
97 dB
43.7 oz.
2" 50.8mm
Thiele & Small Parameters
Resonant Frequency (fo)
DC resistance (Re)
Coil Inductance (Le)
Mechanical Q (Qms)
Electromagnetic Q (Qes)
Total Q (Qts)
Compliance Equivalent Volume (Vas)
Mechanical Compliance of Suspension (Cms)
BL Product (BL)
Diaphragm Mass (Mmd)
Maximum Linear Excursion (Xmax)
Surface Area of Cone (Sd)
87.763 Hz
3.800 Ohms
272.716 mH
6.324
0.330
0.313
21.004 liters/ft3
316.733mm/N
8.002 T-M
16.843 grams
4 mm
218.424 sqM
Mounting Information
Recommended Enclosure Volume
Sealed
Vented
Overall Diameter
Cut Out Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Depth
liters/ ft3
liters/ ft3
8 6/25", 209.5mm
7 2/25", 180mm
fitted as standard
fitted as standard
3 51/100", 89.3mm
Materials of Construction
Copper voice coil
Polyimide former
Ferrite magnet
Vented and extended core
Stamped steel basket
Paper cone
Cloth surround
Solid composition paper dust cap
Earthquake
EQ8 Pro Audio Series
Sound That Will Move You.
Earthquake Sound Corporation
2727 McCone Avenue • Hayward, CA 94545 • phone: 800-576-7944
fax: 510-732-1095 • www.earthquakesound.com
.19" x .35", 5 x 9mm
8 6/25", 209.5mm
3 51/100"
89.3mm
7 2/25", 180mm
