Earthquake Sound Speaker EQ88 User Manual

Specification  
Nominal Basket Diameter  
Nominal Impedance  
Power Rating  
8-1/4", 209.5mm  
8-Ohms  
80 Watts  
Sound That Will Move You  
Resonance  
86.6Hz  
Usable Frequency Range  
Sensitivity  
Magnet Weight  
86.6Hz - 10kHz  
94.1 dB  
42.2 oz.  
Voice Coil Diameter  
2", 50.8mm  
Thiele & Small Parameters  
Resonant Frequency (Fo)  
DC resistance (Re)  
Coil Inductance (Le)  
Mechanical Q (Qms)  
Electromagnetic Q (Qes)  
Total Q (Qts)  
86.6Hz ±15%  
7.2 Ohms  
463.207m mH  
8.067  
0.454  
0.429  
Compliance Equivalent Volume (Vas) 11.696 Ltr / 0.41 cu.ft.  
Mechanical Compliance of Suspension (Cms) 175.843m mm/N  
Earthquake EQ88 Pro Audio Series  
BL Product (BL)  
12.884 T-M  
17.399 grams  
3.2 mm  
dBSPL  
Ohm  
100  
90  
80  
70  
60  
50  
40  
30  
20  
200  
Diaphragm Mass (Mmd)  
Maximum Linear Excursion (Xmax)  
Surface Area of Cone (Sd)  
216.424 sqM  
100  
90  
Mounting Information  
80  
70  
60  
Recommended Enclosure Volume  
Sealed  
Vented  
Overall Diameter  
Cut Out Diameter  
Front Sealing Gasket  
Rear Sealing Gasket  
Mounting Holes Diameter  
Depth  
liters/ ft3  
liters/ ft3  
50  
40  
8-1/4", 209.5mm  
7 1/16", 180mm  
fitted as standard  
fitted as standard  
8-5 x 9mm  
30  
20  
3-4/8", 88mm  
10  
9
Materials of Construction  
8
7
20K  
Copper voice coil  
Polyimide former  
Ferrite magnet  
20 Hz  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
SPL vs Freq  
Vented and extended core  
Stamped steel basket  
Paper cone  
Cloth surround  
Solid composition paper dust cap  
Earthquake Sound Corporation  
2727 McCone Avenue • Hayward, CA 94545 • phone: 800-576-7944  
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