Earthquake Sound manual Earthquake EQ88 Pro Audio Series, SPL vs Freq, Specification

Models: EQ88

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Specification

Specification

Nominal Basket Diameter

8-1/4", 209.5mm

Nominal Impedance

8-Ohms

Power Rating

80 Watts

Resonance

86.6Hz

Usable Frequency Range

86.6Hz - 10kHz

Sensitivity

94.1 dB

Magnet Weight

42.2 oz.

Voice Coil Diameter

2", 50.8mm

Thiele & Small Parameters

Resonant Frequency (Fo)

86.6Hz ±15%

DC resistance (Re)

7.2 Ohms

Coil Inductance (Le)

463.207m mH

Mechanical Q (Qms)

8.067

Electromagnetic Q (Qes)

0.454

Total Q (Qts)

0.429

Compliance Equivalent Volume (Vas)

11.696 Ltr / 0.41 cu.ft.

Mechanical Compliance of Suspension (Cms) 175.843m mm/N

BL Product (BL)

12.884 T-M

Diaphragm Mass (Mmd)

17.399 grams

Maximum Linear Excursion (Xmax)

3.2 mm

Surface Area of Cone (Sd)

216.424 sqM

Sound That Will Move You

Earthquake EQ88 Pro Audio Series

dBSPL

Ohm

100

200

90

 

 

100

 

90

Mounting Information

Recommended Enclosure Volume

Sealed

Vented

Overall Diameter

Cut Out Diameter

Front Sealing Gasket

Rear Sealing Gasket

Mounting Holes Diameter

Depth

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

liters/ ft3 liters/ ft3 8-1/4", 209.5mm 7 1/16", 180mm

fitted as standard fitted as standard 8-5 x 9mm 3-4/8", 88mm

80

 

 

 

 

 

 

 

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

70

70

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

60

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

40

 

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

 

 

 

 

8

20

50

100

200

500

1K

2K

5K

10K

7

20 Hz

20K

SPL vs Freq

Earthquake Sound Corporation

2727 McCone Avenue • Hayward, CA 94545 • phone: 800-576-7944

fax: 510-732-1095 • www.earthquakesound.com

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Earthquake Sound manual Earthquake EQ88 Pro Audio Series, SPL vs Freq, Specification, Thiele & Small Parameters