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Earthquake Sound SWS-8X

150W 8" Shallow Woofer System Series Single 4 ohm Subwoofer

In Stock. Only 2 Left!
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List price $189.99

$119.95

with warranty

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Arrives by Friday, Aug. 1 to zip 20147

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The Extremely Versatile SWS Subwoofers

The SWS-8X by Earthquake Sound features a mounting depth of 2-1/8". With a depth this small the applications for this woofer are endless. This shallow-woofer-system series subwoofer is perfect for those with limited space but that still want some bass in their car. This woofer is also the perfect replacement for factory upgraded systems, especially BMW vehicles. The woofer features a light weight resistant PVC cone and a long-lasting UV treated high-roll composite foam surround for added rigidity, stiffness, longevity and increase power output and performance. Don't let the size of the woofer fool you into thinking it's not powerful, with an Xmax linear excursion of 23mm this woofer will hit low-frequencies with accuracy and precision for a clean, crisp, and responsive bass reproduction. Although often imitated the SWS's 3 protected U.S patents assure that it's never duplicated. If you have 2.5" of space to spare then there is no other option than the SWS series subwoofer.

  • Black 8" Shallow Mount 4 Ohm Subwoofer
  • Power Handling:
    • Peak: 300 watts
    • RMS: 150 watts
  • Impedance: 4 Ohms
  • Long lasting, UV treated high-roll composite foam surround
  • Fits the factory BMW bolt pattern
  • Perfect replacement for factory upgraded systems
  • Easy 8" door-mount
  • Easy under-seat mount
  • First in-dash mount
  • Excellent for rear-deck mounting
  • 1.5" Voice coil
  • Aluminum bobbin
  • Mounting depth: 2-1/8"
  • Xmax: 23.00 mm
  • Sensitivity: 86.7 dB
  • Authorized Internet Dealer
  • 5-year Manufacturer's warranty
Priced Individually

Where Should I Install the SWS Subwoofer?

Earthquake SWS subwoofers are designed to be installed in areas with limited space. This makes them ideal for truck cabs and under seats. As noted in the diagram below, these subwoofers are perfect for installing underneath the front seats, under the rear seats, or behind the rear seats.

Earthquake SWS Shallow Truck Subwoofer Locations

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
SWS (Earthquake)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
8"
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
300 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
150 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Single
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
1.5"
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
 
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
86.7 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
23 mm
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Black
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
UV Treated Foam
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
No
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
No

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Sealed
Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
0.19 cubic feet
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
0.60 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
2-1/8"
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
7-7/8"
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

Yes

Electromechanical Parameters

Free-Air Resonance (Fs)
The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
30.394 Hz
Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
27.830 liters
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
0.669
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 10.
0.804
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
3.500 ohms
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 10.
3.987

Warranty and Return Policy

Parts Warranty Duration
5 years
Labor Warranty Duration
5 years
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
50%
4 Star
40%
3 Star
0%
2 Star
10%
1 Star
0%

Average Attribution Rating

Durability
4.1
Value
3.9
Features
4.0
Design
4.1
Usability
4.8

R0ut3r

Canada

Overall
Durability
Value
Features
Design
Usability

Best product for your BMW

January 17, 2012

Fits nicely in stock box, use JTSherri spacers (find him on BMW forums) to avoid having to make your own. If you properly seal the subwoofer to the box, the sound is very refreshing up from either Logic7/HK or Premium HiFi (M3). No more muddy bass plateau. Use a good amp to drive it, do not attempt to use the stock BMW amp. I bought an Alpine PDX-F4 on this site as well along with a BMW specific harness (look again in BMW forums) for an easy install and am 100% satisfied.

3 of 3 found this helpful

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John

Livonia, MI

Overall
Durability
Value
Features
Design
Usability

Good sound but....

September 7, 2011

For the normal listener, these speakers are great. Really, really better than they appear. Nice warm sound with a lot more punch than expected. They fit perfectly into my BMW 335. Those of you looking to help out the piss-poor factory BMW stereo, these speakers are for you. You will not believe the difference in sound quality. These speakers are a pleasant surprise. I, however, am not the normal listener and melted mine in 6 months. I was running them with a 360 and two Arc Audio KS 900 amps bridged. Again, for the normal listener, these are great. I am sad that I melted them because they sounded so great (just a little too weak for my bleeding ears).

1 of 1 found this helpful

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None

Long Beach,California

Overall
Durability
Value
Features
Design
Usability

Excellent Speaker

December 23, 2013

Very tough and good sounding. Sounds bigger than it looks.

0 of 0 found this helpful

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Money Mario

Detroit, MI

Overall
Durability
Value
Features
Design
Usability

They work good!

September 18, 2013

I used these to replace my logic 7 woofers in my 03 745. there was some mods needed to keep the factory speaker connector but overall pretty good and im powering them off the stock logic 7 amp. They aren't as good as the factory logic 7's but for $150 or whatever this cant be beat I highly recommend these.

0 of 0 found this helpful

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jd

CT

Overall
Durability
Value
Features
Design
Usability

Not Impressed

March 14, 2013

I bought this sub to add a little sound in my pickup, since I use it as a work truck I needed something small that wouldnt take up much space. I made a box to the specs and installed and was not impressed at all!!! The dustcap makes a horrible racket so bad to the point that I took it out, now im stuck with a $170 paper weight not happy at all dont waste your money!

0 of 0 found this helpful

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Bobby

Great Britain

Overall
Durability
Value
Features
Design
Usability

Good upgrade

April 6, 2012

I bought this for my BMW E90. I replaced my standard underseat woofers with these. They are a great upgrade but if you Are looking for serious bass then these will probably not be Enough for you. Run them as mid bass and stick another sub in the trunk. Apart from that these are great

0 of 0 found this helpful

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HKSmoker

Hong Kong

Overall
Durability
Value
Features
Design
Usability

Compact and easy to install

July 25, 2011

This is a great compact subwoofer that can be used as a replacement of the BMW under the seat woofer. It is a direct replacement if you can get the spacers. But the Earthquake is the only choice as a direct replacement and there is no other choice in the market.

0 of 0 found this helpful

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Shawn

Beverly Hills, CA

Overall
Durability
Value
Features
Design
Usability

Good buy

January 31, 2011

Best price for local pickup

0 of 0 found this helpful

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Bloomer

SLC Utah

Overall
Durability
Value
Features
Design
Usability

Pretty impressive

March 21, 2010

Pretty amazing speaker. Good to fill in the gap between your components and sub. I have a Toyota 4runner and have 2 installed in the back panels and work real well for a mid-bass speaker.

0 of 0 found this helpful

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Christian

Reading, PA

Overall
Durability
Value
Features
Design
Usability

Great sound

March 19, 2010

Installed in a BMW 325i to replace the oem subs underneath the front seats. Not much room under the seats, but the SWS-8X fit nicely. Note to others that the box must be sealed to really enjoy all that the subs can provide.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

8" Pro Single Sealed Square Subwoofer Box

Subwoofer mounting depth: 9.5"

Your Price $49.95

NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

Your Price $39.99

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $109.95

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

Spring Post Terminal Cup

Makes adding a spring post terminal to an enclosure simple! Banana clip ready!

Your Price $3.99

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $3.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $12.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $79.99

4 Ft of 1/4" Thick Black Heat Shrink Tubing

Provides abrasion resistance and added protection for your cables.

Your Price $3.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

AutoSound 2000 CD-101

Low frequency test CD

Your Price $11.99

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 Earthquake Sound SWS-8X Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Earthquake Sound SWS-8X Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

3 Earthquake Sound SWS-8X Subwoofers

4 Channel Amp

4 Earthquake Sound SWS-8X Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Items we think you might want

SWS-8XI thumbnail

Earthquake Sound SWS-8XI

• 300 Watts Peak
• 150 Watts RMS
• 2 Ohm
• UV Treated High-Roll Composite Foam Surround
• Fits the Factory BMW Bolt Pattern
• Excellent for Rear-Deck Mounting

Your Price $119.95

Product Summary

Manufacturer

Model Number

SWS-8X

UPC

168975910189

Weight

4.50lbs

Internal SKU

sws8x

Internal Product ID

18035

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Earthquake Sound SWS-8X

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