Garage
Shop

See all parts that fit your 2009 Legacy

Earthquake Sound SWS 8XI

300W Peak (150W RMS) 8" Shallow Woofer System (SWS) Series Single 2-Ohm Car Subwoofer

Product videos
highlight-star-icon

• 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

Learn more about the sws8xi

We apologize

This item has been discontinued


Loading...
SU03B main

Scosche SU03B Wiring Harness

Install a new car stereo in select 1993-2009 vehicles from Subaru

50
-30.15%

$6.95

List price $9.95

SU6 main

PAC SU6

Install a New Car Stereo and Retain the Factory Antenna in select 2005-2014 vehicles from Subaru

-58.33%

$10.00

List price $24.00

SBK923G main

American International SBK923G

Single DIN or Double DIN Stereo Dash Kit for select 2005-2009 Outback and Legacy (Gray)

-60.95%

$24.99

List price $64.00

UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

NSP65 main

NVX NSP65

540W Peak (180W RMS) 6.5" N-Series 2 Way Coaxial Car Speakers

93
-35.19%

$69.99

List price $107.99

XSP652 main

NVX XSP652

600W Peak (200W RMS) 6.5" X-Series 2 Way Coaxial Car Speakers

19
-33.34%

$119.99

List price $179.99

AP-M61SE main

Deaf Bonce Apocalypse AP-M61SE

520W Peak (260W RMS) 6.5” Apocalypse Series Midrange 4-ohm Speakers

8
C2-650 main

JL Audio C2-650

200W RMS 6.5" C2 Series 2 Way Component 4-ohm Speakers

21
C1-650 main

JL Audio C1-650

100W RMS 6.5" C1 Series 2 Way Component 4-ohm Car Speakers

31
SXE-1751S main

Alpine SXE-1751S

440W Peak (80W RMS) 6.5" SXE-Series 2-way 4-ohm Component Speakers with Mylar-Titanium Tweeters

4
-16.67%

$64.99

List price $77.99

Product Highlights


• 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

Description


Earthquake Sound brand icon

Authorized dealer



The Extremely Versatile SWS Subwoofers

The SWS-8XI 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.

Subwoofer Features:

  • 8" Shallow Mount Subwoofer
  • Power Handling:
    • Peak: 300 watts
    • RMS: 150 watts
  • Recommended power range: 50 - 150 watts RMS
  • Impedance: Single 2 Ohm
  • Fits the factory BMW bolt pattern
  • Long lasting, UV treated high-roll composite foam surround
  • Perfect replacement for factory upgraded systems
  • Low profile mount for placement anywhere
  • Inverted style cone design for maximum excursion in shallow mount applications
  • High temperature voice with heat-sink attachment
  • NOMEX/ROMEX spider assembly
  • Aluminum Bobbin
  • 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
  • Protected by 3 U.S. patents
  • Authorized Internet Dealer
  • 5-year Manufacturer's warranty

Loading...
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

122
-33.36%

$79.96

List price $119.99

DMH-1800NEX main

Pioneer DMH-1800NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready

2
-16.67%

$349.99

List price $420.00

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

28
-10.53%

$84.99

List price $94.99

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

12
-9.16%

$109.00

List price $119.99

Limited time!
DMH-W3050NEX main

Pioneer DMH-W3050NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)

1
-24.20%

$469.99

List price $620.00

MPK 163.3 main

Hertz MPK163.3

600W Peak (300W RMS) 6.5" Mille PRO Series 3-way 4-ohm Component Speaker System

2
-14.89%

$999.99

List price $1175.00

KW-M560BT main

JVC KW-M560BT

6.8" Double-DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto (Sirius XM Ready)

10

Specifications & Details


Subwoofer Specifications
Voice Coil Diameter
1.5"
Impedance (Per Voice Coil)
2 ohm
Voice Coil(s)
Single
RMS Power Handling
150 watts
Peak Power Handling
300 watts
Subwoofer Size
8"
Sensitivity
86.7 dB
Xmax (millimeters)
23 mm
Subwoofer Design
Round / Circle
Re-Cone Kit Available
No
Subwoofer Grille
No
Woofer Surround
UV Treated Foam
Main Cone Color
Black
Series
SWS Series
Electromechanical Parameters
Mechanical Q Value (Qms)
3.987
Electrical Resistance of Voice Coil (Re)
3.500 ohm
Electrical Q Value (Qes)
0.804
Total Speaker Q Value (Qts)
0.669
Equivalent Compliance (Vas)
27.830 liters
Free-Air Resonance (Fs)
30.394 Hz
Warranty and Return Policy
Parts Warranty Duration
5 years
Labor Warranty Duration
5 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

SWS-8XI

Weight:

4.50lbs

Internal SKU:

sws8xi

Internal Product ID:

18036

Product and How-to Videos


  • Earthquake SWS Shallow Subwoofers at SEMA 2009
  • Car Subwoofer Size Buying Guide | What Size of Sub Should I Get?

Customer Ratings & Reviews


Earthquake Sound SWS 8XI thumbnail image

5 star
60%
4 star
20%
3 star
20%
2 star
0%
1 star
0%



Durability
4
Value
4
Features
4.2
Design
4.4
Usability
4.6

Customer Reviews

Sort by:

Loading...

Awesome product!

Great set of subs to fit in your OEM BMW housing. And the 2ohms are great to give it extra boost in case your amp isn't the greatest. Just be sure to get some sort of spacer to make it fit perfectly without any problems.

By Steven on March 30, 2010

36 found this helpful


Good value

I bought these speakers for my BMW E92. They are a direct replacement for the factory fitted ones and they work very well. Great speaker.

By Mr PPN on September 13, 2010

30 found this helpful


Sub for lower watts amp

If you are the listener who prefer deep bass on lower volume this sub is for you. On the higher volumes it is average boom sub.

By Alex on July 25, 2015

27 found this helpful


Good service but not so good product

I live out of the USA so I was not able to return the product, but one of the subwoofers had a damaged wire that we repaired locally.

By lask on April 7, 2011

28 found this helpful


Amazing compact sub

A bit pricey, but sounds great and the size is great for tight spaces

By Mariano on April 26, 2022 Checkmark Icon Verified purchase

15 found this helpful


Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2009 Subaru Legacy

1997 BMW 318i

2005 Mitsubishi Eclipse Spyder

1995 Toyota Tercel

2010 Chrysler 300

2008 BMW 750i

1990 Mercury Sable

2011 Dodge Durango

2000 Mazda B2500

2025 Subaru BRZ

Vehicle
Store
Delete

2019 Can-Am Defender DPS HD5

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.