Earthquake Sound EQ12S8 - Manual

Specification
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
Thiele & Small Parameters
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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Mounting Information
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
Materials of Construction
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
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