Earthquake Sound EQ12S8 Leaflet

Nominal Basket Diameter
Nominal Impedance
Max Power Rating
Resonance
Usable Frequency Range
Sensitivity
Magnet Weight
Voice Coil Diameter

12-1/4", 310 mm

8-Ohms

400 Watts

319 Hz

280 Hz - 6 kHz

97 dB (2.83V/1M)

50 oz.

1.97”, 50 mm

Resonant Frequency (Fs)
DC resistance (Re)
Coil Inductance at Fs (Lces)
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)

319 Hz

6.8 Ohms

5.72
2.88
1.91

1.179 mH

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4.0mm

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Recommended Enclosure Volume
    Sealed
    Vented
Overall Diameter
Cut Out Diameter
Front Sealing Gasket
Rear Sealing Gasket
Mounting Holes Diameter 
Mounting Depth

3

 ft , 28.3-59.5 liters

12-1/4”, 310 mm

fitted as standard
fitted as standard

5/16” x 3/8” , 7 mm x 9 mm

4-9/16”, 116 mm

1.0-2.1

11-1/16”, 281 mm

Aluminum voice coil
Polyimide former
Ferrite magnet
Vented and extended core
Stamped steel basket
Paper cone
Cloth surround
Solid composition paper dust cap

Earthquake

 EQ12S8 Pro Audio Series

Earthquake Sound Corporation
2727 McCone Avenue • Hayward, CA 94545 • phone: 800-576-7944
fax: 510-732-1095 • www.earthquakesound.com