EarthQuake EQ8S8 User manual

Specification

Nominal Basket Diameter

Nominal Impedance

Power Rating

Resonance

Usable Frequency Range

Sensitivity

Magnet Weight

Voice Coil Diameter

8-3/16", 209mm

8-Ohms

80 Watts

395Hz

395Hz - 5kHz

96.3 dB

42.2 oz.

1.5" 38.6mm

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)

395Hz ±15%

6.5 Ohms

367.888m mH

3.896

1.662

1.165

.75 liters / .0624 cu.ft.

11.806mm/N

11.557 T-M

12.001 grams

1.6 mm

211.241 cm

Mounting Information

Recommended Enclosure Volume

Sealed

Vented

Overall Diameter

Cut Out Diameter

Front Sealing Gasket

Rear Sealing Gasket

Mounting Holes Diameter

Depth

liters/ ft3

liters/ ft3

8 3/16", 209mm

7 1/8", 181mm

fitted as standard

fitted as standard

2-15/16", 88mm

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 EQ8S8 Pro Audio Series

4-5.5 x 10mm

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

SPL vs Freq

20 Hz 50 100 200 500 1K 2K 5K 10K 20K

dBSPL

30

40

50

60

70

80

90

100

110 Ohm

6

7

8

9

10

20

30

40

50

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