ISUDAR Underseat Subwoofer For BMW E60 E70 E81 E90 F10 F20 F30 Series

Know more from here: Depending on your audio system, your factory BMW woofers come in 2, 4, or 8 Ohm impedance. This speakers are 2 OHM version, they fit for the car which has factory 2 OHM bass speakers. It can’t fit for the car which has 4 OHM or 8 OHM factory speakers. If you need, please contact with us. 2X THE BASS Our woofers are 10 dB louder from 20Hz to 60Hz vs factory woofers, resulting in twice the loudness in this critical “sub-bass” range (and over 8x the sonic energy). You won’t just hear the bass, you’ll feel it. Every watt of power generated by your amplifier yields about 2x the bass output with our woofers vs factory woofers.