This is the Focal ISUB BMW2 8” Under-seat 2 Ohm Subwoofer For BMW Vehicles

ISUB BMW 2 is a subwoofer that delivers powerful bass thanks to its neodymium motor, a high-performance Focal technology. With the ISUB BMW 2, sound is natural and installation quick, thanks to the spacer integrated into the chassis, which allows perfect integration into original locations. Thanks to its 2 Ohms impedance, it's a perfect match for the Impulse 4.320 amplifier.