Due to Shipper and Supplier Delays, Your Order May Take an Additional 1-3 Days to Ship. Read our COVID-19 Update
Now Offering CURB-SIDE Pickup / FREE SHIPPING on Orders $49+ *exclusions apply
Sales & Specials

ES#3677555 - SWS-8XIKT - Earthquake Sound Shallow 2-ohm Subwoofer Set - Direct plug-and-play underseat subwoofer upgrade delivers deep, crisp bass and an easy install. - Earthquake Sound - BMW

Earthquake Sound Shallow 2-ohm Subwoofer Set

Direct plug-and-play underseat subwoofer upgrade delivers deep, crisp bass and an easy install.
For vehicles with aftermarket audio amplifier
Mfg Part #
ECS Part #
Earthquake Sound
Free Shipping Free Shipping
on orders $49 and up
Availability: Ships on Nov 19, 2020
Does this fit my vehicle?

Product Details

For vehicles with aftermarket audio amplifier

Rock your 3 series 06 on - replace your under-seat speakers with this shallow subwoofer. This patented, 8" subwoofers from Earthquake Sound is designed specifically for BMWs and is original equipment on many models outside North America. As a result, it is a direct replacement for the 8" factory speakers under the front seats. A traditional 8" subwoofer requires about 4" of mounting depth, but these Earthquake subs were engineered to reduce the mounting depth required - just 2-1/8" - without reducing the depth or quality of the sound. In fact, the long throw excursion (amount of travel of the speaker) is more than 1.5"! The result is tight, crisp and deep bass from a very shallow space (less than 0.2 cu. ft.).

There are two versions of the subwoofer: the version sold here is the SWS-8Xi -- a 2-ohm version for aftermarket amplifiers. If your car had the standard factory sound system, you'll want the SWS-8X -- a 4-ohm version. Both are rated at 300 watts max and feature a high-efficiency, 1.5" voice coil made of aluminum to help to dissipate heat build-up. (I.e. sound integrity is maintained during prolonged use.)

Installation is simple, just unbolt the seat and tilt it back (no need to remove any electrical connectors or airbag hardware) to access the factory speaker. The Earthquake sub mounts directly in place of the BMW sub. We include adapter rings, plus wiring and connectors that allow you to plug the Earthquake sub directly into the BMW factory harness plug. Shouldn't take more than 30 minutes per side.

This Part Fits the Following Vehicles

Make Model Submodel Engine
BMW E82 1 M Coupe N54 3.0L
BMW E82 128i N52 3.0L
BMW E82 135i N54 3.0L
BMW E82 135i N55 3.0L
BMW E84 X1 sDrive28i N20 2.0L
BMW E84 X1 xDrive28i N20 2.0L
BMW E84 X1 xDrive35i N55 3.0L
BMW E88 128i N52 3.0L
BMW E88 135i N54 3.0L
BMW E88 135i N55 3.0L
BMW E90 325i N52 3.0L
BMW E90 325xi N52 3.0L
BMW E90 328i N52 3.0L
BMW E90 328xi N52 3.0L
BMW E90 330i N52 3.0L
BMW E90 330xi N52 3.0L
BMW E90 335d M57 3.0L
BMW E90 335i N54 3.0L
BMW E90 335i N55 3.0L
BMW E90 335xi N54 3.0L
BMW E90 335xi N55 3.0L
BMW E90 M3 S65 4.0L
BMW E91 325i N52 3.0L
BMW E91 325xi N52 3.0L
BMW E91 328i N52 3.0L
BMW E91 328xi N52 3.0L
BMW E92 328i N52 3.0L
BMW E92 328xi N52 3.0L
BMW E92 335i N54 3.0L
BMW E92 335i N55 3.0L
BMW E92 335is N54 3.0L
BMW E92 335xi N54 3.0L
BMW E92 335xi N55 3.0L
BMW E92 M3 S65 4.0L
BMW E93 328i N52 3.0L
BMW E93 335i N54 3.0L
BMW E93 335i N55 3.0L
BMW E93 335is N54 3.0L
BMW E93 M3 S65 4.0L
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

Kit Contents

Description Brand Qty
Earthquake Subwoofer Adapter Rings - Pair Earthquake Sound - Corporate Logo 1
Earthquake Shallow Subwoofer Earthquake Sound - Corporate Logo 2

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

Terms of Use Privacy Policy ECS Tuning is part of Enthusiast Auto Holdings