The MW 8BMW-D subwoofers are not only the ideal upgrade for those who are dissatisfied with the bass response in their BMW, but particularly for those who want to realize unprecedented space saving installation concepts. The BMW-specific baskets and Plug & Play connectors allow a fast and easy installation into the original mounting positions of all BMW model ranges with under-seat subwoofers. Nevertheless, these subwoofers are also perfectly qualified for universal applications. Furthermore, the special speaker connector with its gold-plated screw terminals allows two different configurations. If the metal bracket is mounted the woofer has an impedance of 1 x 4 Ohms – without the metal bracket each voice coil can be driven separately (in this case 2 x 2 Ohms) which is perfect for the combination with MATCH Plug & Play amplifiers. No matter if these subwoofers are used as bass upgrade in your BMW or as problem-solver in small sub enclosures, they will definitely add loads of powerful bass for musical enjoyment. If the metal bracket is mounted the woofer has an impedance of 1 x 4 Ohms. Without the metal bracket each voice coil can be driven separately (impedance in this case 2 x 2 Ohms) which guarantees a perfect interaction with MATCH Plug & Play amplifiers. Technical data Power RMS / max. P 200 / 400 Watts Impedance Z 2 x 2? DC resistance Re 3.4? Resonance frequency Fs 46 Hz Mechanical Q factor Qms 4.45 Electrical Q factor Qes 0.59 Total Q factor Qts 0.52 Compliance Cms 272 µm/N Equivalent air volume Vas 17.3 L Force factor BI 8.6 Tm Efficiency 1 W / 1 m SPL 90 dB Cone area Sd 214 cm² Moving mass Mms 44.2 g Cone material Hand-scooped paper cone Mechanical resistance Rms 0.74 kg/s Voice coil diameter ø 42.5 mm Voice coil winding height 12.5 mm Max. Linear excursion Xmax +/- 4.0 mm Outer diameter ø 239 mm / 9.41″ Installation diameter ø 175 mm / 6.89″ Installation depth 40 mm / 1.57″ Recommended enclosure volumes Sealed box Net volume 3 L Lower limiting frequency (-3dB) 63 Hz DSP settings Highpass: Butterworth; 12 dB/octave; crossover frequency 40 Hz Additional EQ filter: center frequency 90 Hz; Q factor 3.0; gain -4 dB Lowpass: Butterworth; 24 dB/octave; crossover frequency 80 – 100 Hz Vented box For one subwoofer For two subwoofers Net volume 12 L 24 L Port diameter ø 60 mm / 2.36″ 80 mm / 3.15 Port area 28 cm² 50 cm² Port length 25 cm / 9.84″ 20 cm / 3.94″ Port tuning frequency Fb 46 Hz 46 Hz Lower limiting frequency (-3dB) 45 Hz 45 Hz DSP settings Highpass: Self-Define; crossover frequency 40 Hz; Q factor 1.3 Additional EQ filter: center frequency 67 Hz; Q factor 3.0; gain -3 dB Lowpass: Butterworth; 24 dB/octave; crossover frequency 80 – 100 Hz Contents. 2 x Subwoofer MATCH MW 8BMW-D. 2 x Plug connector for original BMW cable harness. 1 x Instruction manual.