BMW 1 SERIES 8 UNDERSEAT SUBWOOFER 160 WATTS UPGRADE CAR AUDIO GROUND ZERO. Supply details of your dream bundle. Car specific 200 mm / 8? 50 mm / 2? 1 pair / package. Model – Car specific subwoofer. Diameter – 200 mm / 7.87. 100 / 160 Watts. Impedance – 4 Ohms. Efficiency – 89 dB. Frequency Response- 35 – 250 Hz. Voice Coil – 50 mm / 2 copper. Any product you return must be in the same condition you received it and in the original packaging. Award winning products and innovative product design from the UK’s number one car audio brand.