Specification
Nominal Basket Diameter
Nominal Impedance
Power Rating
Resonance
Usable Frequency Range
Sensitivity
Magnet Weight
Voice Coil Diameter
6-5/8", 168mm
8-Ohms
50 Watts
112.4Hz
112Hz - 10kHz
89.7
17.8 oz.
1 3/8", 35.5mm
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%
6.8 Ohms
396.050 mH @ 1kHz
4.999
0.958
0.804
4.122 liters/0.14 ft3
159.797mm/N
7.932 T
•
M
11.653 grams
3.5mm
134.782 sqM
Mounting Information
Recommended Enclosure Volume
Sealed
Vented
Overall Diameter
Cut Out Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter
Depth
2.8-5.7 liters/0.1-0.2 ft3
3.4-15.6 liters/0.12-0.55 ft3
6-5/8", 168mm
5-5/8"", 144mm
fitted as standard
fitted as standard
0.27" x 0.21" , 4-5.5mm x 6.8mm
2-5/8", 66.9mm
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
EQ68 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
20 Hz
50
100
200
500
1K
2K
5K
10K
20K
dBSPL
20
30
40
50
60
70
80
90
100
Ohm
6
7
8
9
10
20
30
40
50
60
SPL vs Freq
