Simply remove the seats and replace the factory woofers with the exact-fitting SWS-8Xi woofers to improve the sound quality of your mobile audio. In addition to BMW cars, the SWS series are the perfect BASS solution for any car.

With a patented inverted style and ribbed cone design, this 8-inch subwoofer maximizes excursion in shallow mount applications, allowing for placement in almost any location. The innovative design moves suspension components to the side, reducing mounting depth while enhancing sound capability.

Earthquake Sound Corporation is the original inventor of the Shallow Woofer System (SWS) that produces a lot of bass from a small space. They are a popular choice for replacing OEM car speakers with shallow mounting depths. In addition to OEM applications, the SWS series are the perfect bass solution for any car.

A low profile and inverted style cone design allows the SWS-8Xi to have maximum excursion in shallow mount applications. Pioneered by Joseph Sahyoun and protected by multiple global patents, these low profile subwoofers can be placed almost anywhere.

Our most popular size is the SWS-8” as it is a direct drop-in BMW factory replacement for the woofers located under the front seats. Simply remove the seats and replace the factory woofers with the SWS-8 woofers to improve the sound quality.

Earthquake Sound Corporation is the original inventor of the Shallow Woofer System (SWS) that produces a lot of bass from a small space. Designed to replace the BMW factory speakers that are located under the front seats, the SWS-8X requires no modification.

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Simply remove the seats and replace the factory woofers with the SWS-8 woofers to improve the sound quality. Earthquake Sound also produces the SWS-8Xi that has a 2Ω voice coil - the same impedance as the BMW factory speakers.

Enjoy a rich full bodied sound with articulation and dynamics rivaling home hifi audiophile systems. 3. Plays louder and cleaner than standard woofer - using less power. 4. Works perfectly with factory amplifier, while still capable of further SPL with upgraded amplifiers.

SWS-8Xi - Earthquake Shallow-Mount 8" Single 2 ohm Subwoofer; SWS-8Xi - Earthquake Shallow-Mount 8" Single 2 ohm Subwoofer. SKU #: 80071 ; Be the first to review this product. Special Price $119.99 . Retail: $189.99 ($70.00 savings) Availability: Discontinued. Condition: Brand New. Shipping ...