Earthquake Sound EQ68 Owners Manual
Specification
Nominal Basket Diameter
Nominal Impedance
Power Rating
Resonance
Usable Frequency Range
Sensitivity
Magnet Weight
Voice Coil Diameter
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)
112.375Hz ±15%
396.050 mH @ 1kHz
4.122 liters/0.14 ft3
Mounting Information
Recommended Enclosure Volume
Sealed
Vented
2.8-5.7 liters/0.1-0.2 ft3
3.4-15.6 liters/0.12-0.55 ft3
Overall Diameter
Cut Out Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
0.27" x 0.21" , 4-5.5mm x 6.8mm
fitted as standard
fitted as standard
Depth
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
6-5/8", 168mm
8-Ohms
50 Watts
112.4Hz
112Hz - 10kHz
89.7
17.8 oz.
1 3/8", 35.5mm
6.8 Ohms
4.999
0.958
0.804
159.797mm/N
7.932 T•M
11.653 grams
3.5mm
134.782 sqM
6-5/8", 168mm
5-5/8"", 144mm
2-5/8", 66.9mm
Sound That Will Move You
Earthquake EQ68 Pro Audio Series
dBSPL
100
90
80
70
60
50
40
30
20
20 Hz 50 100 200 500 1K 2K 5K 10K 20K
SPL vs Freq
Earthquake Sound Corporation
2727 McCone Avenue • Hayward, CA 94545 • phone: 800-576-7944
fax: 510-732-1095 • www.earthquakesound.com
Ohm
60
50
40
30
20
10
9
8
7
6
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