Specification

Nominal Basket Diameter

12-1/4", 310 mm

Nominal Impedance

8-Ohms

Max Power Rating

400 Watts

Resonance

319 Hz

Usable Frequency Range

280 Hz - 6 kHz

Sensitivity

97 dB (2.83V/1M)

Magnet Weight

50 oz.

Voice Coil Diameter

1.97”, 50 mm

Thiele & Small Parameters

Resonant Frequency (Fs)

319 Hz

DC resistance (Re)

6.8 Ohms

Coil Inductance at Fs (Lces)

1.179 mH

Mechanical Q (Qms)

5.72

Electromagnetic Q (Qes)

2.88

Total Q (Qts)

1.91

Compliance Equivalent Volume (Vas)

--

Mechanical Compliance of Suspension (Cms)

--

BL Product (BL)

--

Diaphragm Mass (Mmd)

--

Maximum Linear Excursion (Xmax)

4.0mm

Surface Area of Cone (Sd)

--

Mounting Information

Recommended Enclosure Volume

Sealed

 

Vented

1.0-2.1 ft3, 28.3-59.5 liters

Overall Diameter

12-1/4”, 310 mm

Cut Out Diameter

11-1/16”, 281 mm

Front Sealing Gasket

fitted as standard

Rear Sealing Gasket

fitted as standard

Mounting Holes Diameter

5/16” x 3/8” , 7 mm x 9 mm

Mounting Depth

4-9/16”, 116 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

Sound That Will Move You.

Earthquake EQ12S8 Pro Audio Series

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 EQ12S8 manual Specification, Thiele & Small Parameters, Mounting Information, Materials of Construction

EQ12S8 specifications

The Earthquake Sound EQ12S8 is a powerful subwoofer that has made waves in the audio industry for its impressive combination of sound quality, performance, and innovative features. With its dedication to providing deep, rich bass, this subwoofer is particularly popular among home theater enthusiasts and audiophiles who seek an immersive audio experience.

One of the standout features of the EQ12S8 is its robust 12-inch driver, engineered to deliver exceptional low-frequency response. This large driver is complemented by a heavy-duty cast aluminum frame that not only enhances durability but also minimizes unwanted vibrations during operation. This results in cleaner sound reproduction, ensuring that even the most complex audio passages are presented with clarity and precision.

The EQ12S8 also incorporates an efficient, high-power amplifier that provides a rich 400 watts of dynamic power. This amp is designed to deliver consistent performance across various listening levels, making it suitable for everything from heart-pounding movie soundtracks to intricate musical compositions. With a frequency response range that typically spans from 25 Hz to 150 Hz, this subwoofer covers the necessary low-end spectrum, bringing music and films to life with compelling depth.

Another key characteristic of the EQ12S8 is its versatile enclosure design. The subwoofer is housed in a vented enclosure that is optimized for airflow, reducing turbulence and distortion. This design promotes a more extended low-end response while maintaining tight control over bass output. Additionally, the compact size of the enclosure allows for flexible placement options, making it an ideal choice for various room sizes and configurations.

The Earthquake Sound EQ12S8 also features adjustable low-pass crossover and phase controls, allowing users to tailor the sound to their specific environment and preferences. These controls facilitate seamless integration with existing audio systems, ensuring that the subwoofer complements other speakers effectively.

In conclusion, the Earthquake Sound EQ12S8 is a highly capable subwoofer that excels in delivering powerful bass while remaining versatile and adaptable to different audio setups. Its combination of a high-performance driver, advanced amplifier, and thoughtful design make it a top choice for those looking to elevate their audio experience, whether it be in home theaters, music production, or any space that demands high-quality sound reproduction.