Earthquake Sound : >>> Earthquake Sound SWS-8X Shallow Woofer System Series Single 4 Ohm 600 Watt 8" Car Subwoofer + Speaker Adapter (pair). *) Earthquake Sound SWS-8XI Shallow Woofer System Series Single 2 Ohm 600 Watt 8" Car Subwoofer + Speaker Adapter (pair). Earthquake Sound.

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