We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black 8-inch shallow-mount car subwoofer with inverted cone and single 2-ohm voice coil

Earthquake Sound

Earthquake Sound SWS-8Xi 8" 300W 2 Ohm Car Subwoofer

SKU CH-YQVY-N63C2

An 8-inch shallow-mount car subwoofer with 150W RMS power and 86.7 dB sensitivity for tight spaces

  • Subwoofer size8 in (20.3 cm)
  • Cone material8 in Woofer
  • Surround materialFoam
  • Voice coilSingle
  • Peak wattage300 W
  • RMS power rating150 W
  • Shallow 2-1/8" mount fits tight vehicle spaces
  • 150W RMS power delivers consistent bass output
  • 7 dB sensitivity produces loud sound efficiently
  • Inverted cone design maximises excursion in shallow enclosures
  • Direct BMW under-seat replacement requires no modifications

Shallow-Mount Subwoofer

The Earthquake Sound SWS-8Xi is an 8-inch shallow-mount car subwoofer rated at 150W RMS and 300W peak power. Its 2-1/8-inch mounting depth allows installation in tight factory locations without modification. The single 2-ohm voice coil and 86.7 dB sensitivity suit amplifiers designed for low-impedance loads. Protected by three U.S. patents, it targets owners seeking direct-fit bass upgrades.

Direct-Fit BMW Upgrade

This unit is engineered as a drop-in replacement for factory under-seat woofers in compatible BMW models, requiring no cutting or adapters. It also fits other vehicles with similarly shallow mounting cavities. Buyers needing deeper enclosures, higher SPL output, or dual voice-coil wiring flexibility should consider alternative designs. The shallow profile inherently limits maximum cone excursion compared to standard-depth subwoofers.

Inverted Cone and Spider Design

The inverted cone profile maximises usable excursion within the minimal mounting depth, while the NOMEX/ROMEX spider assembly and aluminium bobbin improve thermal handling. A high-temperature voice coil with an integrated heat-sink attachment helps sustain performance during extended play. These features collectively enable reliable output from the compact chassis without requiring additional installation hardware.

How it compares

Measured against everything we stock in Car Subwoofers & Enclosures, at today’s prices. Recalculated every night.

Price $110.99
Cheaper than about 70% of the 268 comparable items (median $185.49).

Specifications

Product
Brand nameEarthquake Sound
Product lineShallow Woofer System Series
Product typeWoofer
Product colorBlack
Audio & video
RMS power rating150 W
Audio sensitivity86.7 dB
Rated impedance2 Ohm
Power
Peak wattage300 W
Size & build
Subwoofer size8 in (20.3 cm)
Cone material8 in Woofer
Surround materialFoam
Mounting depth2-1/8 in
More details
Voice coilSingle

Questions about this item

Does this 2-ohm subwoofer need a 2-ohm stable amplifier to work?

Yes, the 2-ohm impedance requires an amplifier rated stable at 2 ohms and able to deliver around 150 W RMS for proper performance.

Will the 2-1/8-inch mounting depth fit behind my factory door panels?

The shallow 2-1/8-inch depth is designed for tight spaces like under-seat locations, but you must measure your specific door cavity to confirm clearance.

How can I verify the 86.7 dB sensitivity is performing correctly after install?

Play a known test tone at a set amplifier gain and measure output with an SPL meter; the reading should match the expected level for 86.7 dB sensitivity at 1 watt / 1 metre.

More in Car Subwoofers & Enclosures

Similar items