Please note these do not include gaskets or speaker wiring adapters – these can be bought separately. Please also note there is a small puncture mark on one of the speakers – please see pictures. There are two speakers included. The Earthquake SWS Shallow Subwoofer for BMW MINI is a powerful 150W RMS subwoofer designed to be installed under the seat of your vehicle. With a single voice coil and 4? Impedance, this 8-inch subwoofer from Earthquake Sound delivers deep, resonant bass for an enhanced in-car audio experience.