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, Specification, Thiele & Small Parameters

EQ88 specifications

The Earthquake Sound EQ88 is a versatile and high-performance equalizer designed to enhance the audio experience for both professionals and enthusiasts. With its 8-channel capabilities, it allows users to fine-tune their sound system to achieve optimal audio quality tailored to their specific environment.

One of the standout features of the EQ88 is its 31-band graphic equalization per channel. This provides a comprehensive range for precise control over frequency responses, enabling users to adjust the lows, mids, and highs with exceptional accuracy. The visual representation of the frequency bands helps users see the adjustments in real-time, making it easier to achieve the desired sound profile.

The EQ88 employs a highly efficient and low-noise circuitry design, which minimizes interference and ensures that the clarity of sound is maintained. This attention to detail in the circuit design contributes to the overall fidelity and dynamic response of the audio, making it suitable for both live sound applications and studio settings.

Another impressive characteristic of the EQ88 includes its dual function. It can be operated as a traditional equalizer or as a crossover, allowing for even greater versatility. This can be particularly useful for sound engineers and DJs who require different configurations depending on the performance environment. The ability to switch seamlessly between modes without compromising sound quality makes it a valuable tool in any audio setup.

Connectivity is another strong point of the EQ88. It features balanced XLR inputs and outputs, as well as unbalanced RCA connections. This variety of options ensures compatibility with a wide range of audio equipment, enabling easy integration into existing systems. Additionally, the EQ88 includes a dedicated subwoofer output, allowing for enhanced low-frequency support, a key component for delivering powerful bass response in any sound setup.

The build quality of the EQ88 is robust and designed for durability. With its rack-mounted design, it can easily fit into standard audio racks, making it ideal for both professional studios and mobile setups. The front panel controls are intuitively laid out, providing quick access to essential functions such as input level, bypass, and overall volume.

In summary, the Earthquake Sound EQ88 is an effective and feature-rich equalizer engineered for a wide range of audio applications. With its advanced technologies, user-friendly design, and comprehensive connectivity options, it is a reliable choice for those seeking to elevate their sound quality and tailor their audio experience with precision.