EarthQuake EQ88 User manual

Specification

Nominal Basket Diameter

Nominal Impedance

Power Rating

Resonance

Usable Frequency Range

Sensitivity

Magnet Weight

Voice Coil Diameter

8-1/4", 209.5mm

8-Ohms

80 Watts

86.6Hz

86.6Hz - 10kHz

94.1 dB

42.2 oz.

2", 50.8mm

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)

86.6Hz ±15%

7.2 Ohms

463.207m mH

8.067

0.454

0.429

11.696 Ltr / 0.41 cu.ft.

175.843m mm/N

12.884 T-M

17.399 grams

3.2 mm

216.424 sqM

Mounting Information

Recommended Enclosure Volume

Sealed

Vented

Overall Diameter

Cut Out Diameter

Front Sealing Gasket

Rear Sealing Gasket

Mounting Holes Diameter

Depth

liters/ ft3

8-1/4", 209.5mm

7 1/16", 180mm

fitted as standard

3-4/8", 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 EQ88 Pro Audio Series

8-5 x 9mm

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

100 Ohm

100

200

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