• Earthquake Sound SWS Shallow Mount Subwoofers
  • Earthquake Sound SWS Shallow Mount Car Subwoofers
  • Subwoofer Size Buying Guide
Earthquake Sound SWS-8X: main picture thumbnail Earthquake Sound SWS-8X: alternate picture thumbnail Earthquake Sound SWS-8X: alternate picture thumbnail Earthquake Sound SWS-8X: alternate picture thumbnail Earthquake Sound SWS-8X: alternate picture thumbnail

Earthquake Sound SWS-8X

8" Single 4 ohm Shallow Woofer System Series Car Subwoofer

  • 4.1

(8 reviews)

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$189.99

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$129.95

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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 SWS
Subwoofer Size 8"
Peak Power Handling 300 watts
RMS Power Handling 150 watts
Voice Coil(s) Single
Impedance (Per Voice Coil) 4 ohms
Voice Coil Diameter 1.5"
Sensitivity 86.7 dB
Xmax (millimeters) 23 mm
Subwoofer Design Round / Circle
Main Cone Color Black
Woofer Surround UV Treated Foam
Subwoofer Grille No
Re-Cone Kit Available No
Recommended Enclosure Specifications
Recommended Enclosure Type Sealed
Minimum Sealed Box Volume 0.19 cubic feet
Maximum Sealed Box Volume 0.60 cubic feet
Top-Mount Depth 2-1/8"
Cutout Diameter 7-7/8"
Shallow Mount Installation Yes
Electromechanical Parameters
Free-Air Resonance (Fs) 30.394 Hz
Equivalent Compliance (Vas) 27.830 liters
Total Speaker Q Value (Qts) 0.669
Electrical Q Value (Qes) 0.804
Electrical Resistance of Voice Coil (Re) 3.500 ohms
Mechanical Q Value (Qms) 3.987
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 5 years
Labor Warranty Duration 5 years
Warranty Provider Manufacturer
Customer Review Summary for Earthquake Sound SWS-8X
Average Customer Rating is 4.1 out of 5 stars:
  • 4.1
based on 8 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
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38%
4 star:
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50%
3 star:
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0%
2 star:
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13%
1 star:
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0%
what's this?
Average Attributes Rating:
Durability
  • 3.9
3.9
Value
  • 3.8
3.8
Features
  • 3.9
3.9
Design
  • 4.0
4.0
Usability
  • 4.8
4.8
what's this?
Quick Comparison:
Most Helpful Customer Reviews:
January 17, 2012 Best product for your BMW
2 of 2 people found the following review helpful:
Review by
R0ut3r from Montreal, Canada
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
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.
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March 14, 2013 Not Impressed
Review by
jd from CT
Overall
  • 2.0
Durability
  • 2.0
Value
  • 1.0
Features
  • 3.0
Design
  • 2.0
Usability
  • 4.0
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!
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April 6, 2012 Good upgrade
Review by
Bobby from Essex, Great Britain
Overall
  • 4.0
Durability
  • 4.0
Value
  • 4.0
Features
  • 4.0
Design
  • 4.0
Usability
  • 4.0
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
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September 7, 2011 Good sound but....
Review by
John from Livonia, MI
Overall
  • 4.0
Durability
  • 2.0
Value
  • 3.0
Features
  • 3.0
Design
  • 2.0
Usability
  • 5.0
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).
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July 25, 2011 Compact and easy to install
Review by
HKSmoker from Hong Kong, Hong Kong
Overall
  • 4.0
Durability
  • 4.0
Value
  • 3.0
Features
  • 4.0
Design
  • 4.0
Usability
  • 5.0
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.
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View All 8 Reviews for Earthquake Sound SWS-8X
Speaker Wire
Choose from our recommended speaker wire to hook up your amplifier to your new subwoofer. The higher quality of speaker wire that it used for this connection, the better your subwoofer will sound.
  Product Price Add?
15 ft. of 12 AWG StreetWires Speaker Wire 15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer.
$24.99
20 ft. of 12 AWG Kicker Speaker Wire 20 ft. of 12 AWG Kicker Speaker Wire
Kicker uses twisted pair technology and hyper-flex cable to provide you with the cleanest sound and a simple installation.
$39.95
Sound Dampening Material
Get the most sound out of your new subwoofer with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
  Product Price Add?
Dynamat Rubber Roller Dynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat!
$18.99
Dynamat Xtreme Trunk Kit Dynamat Xtreme Trunk Kit
Get better sounding bass from your new subwoofer with enough Dynamat Extreme for your entire trunk.
$93.99
Enclosure Accessories
These accessories are designed to help you build the custom enclosure that you have always wanted, or add to the box that you already bought. Either way, these products can assist you in achieving better sound, better looks, and more bass!
  Product Price Add?
20 oz. Bag of Poly-Fil 20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system.
$5.99
16 oz. Can of Adhesive Spray 16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.
$5.99
Binding Post Terminal Cup Binding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure.
$4.99
Banana Clip Terminals Banana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.
$4.99
Installation, Tools & Accessories
Don't forget to get the tools and accessories that will help you install your new subwoofer in your vehicle. Whether you opt for the professional installation card or the do-it-yourself method, you will need the following to help you out!
  Product Price Add?
Car Stereo and Speaker / Subwoofer Installation Tool Kit Car Stereo and Speaker / Subwoofer Installation Tool Kit
Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.
$14.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
  Product Price Add?
Scosche SPL Meter Scosche SPL Meter
Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.
$24.99
AutoSound 2000 CD-101 AutoSound 2000 CD-101
Low frequency test CD
$12.99
AutoSound 2000 CD-102 AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-103 AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
Main Product
  Product Price Add?
Earthquake Sound SWS-8X Earthquake Sound SWS-8X $129.95
Related products
Earthquake Sound SWS-8XI
8" Shallow Mount Subwoofer • 2 Ohm • 300 Watts Max • 150 Watts RMS • UV Treated High-Roll Composite Foam Surround • Fits the Factory BMW Bolt Pattern • Excellent for Rear-Deck Mounting

For more information on wiring subwoofers, visit our Subwoofer Wiring Guide: Subwoofer Wiring Guide

Product Summary

Manufacturer: Earthquake Sound
Model number: SWS-8X
UPC: 168975910189
Weight: 4.25 lbs
Internal SKU: sws8x
Internal product ID: 18035