These speakers are designed using Klippel optimization to precisely match the original BMW subwoofer locations.

Passed 600WRMS "torture" test - High efficiency, high quality car subwoofer designed to work in a small box - Reinforced paper cone diffuser covered with a special layer - Optimized magnet structure for maximum efficiency - high efficiency copper coil, POLYCOT audiophile suspension (spider) Power: 600W RMS Resistance: 2 x 2 Ohm Sensitivity: 87.

Ground Zero German company producing and developing speakers for your car since 1975.

10" / 200 mm woofers for BMW original mounting positions.

10" / 200 mm woofers for BMW original mounting positions.

Power: RMS 300W / MAX 600W Resistance: 2 x 2 Ohms Sensitivity: 90 dB Installation depth: 144 mm Installation diameter: 286 mm Voice coil diameter: 50.

Power: RMS 300W / MAX 600W Resistance: 2 x 2 Ohms Sensitivity: 88 dB Installation depth: 126 mm Installation diameter: 232 mm Voice coil diameter: 50.

The HERTZ brand was created in 1998.

The HERTZ brand was created in 1998.

The HERTZ brand was created in 1998.

Power: RMS 750W / MAX 1500W Resistance: 2 x 2 Ohms Sensitivity: 85 dB Installation depth: 163 mm Installation diameter: 234 mm Voice coil diameter: 63.

Power: RMS 1000W / MAX 2000W Resistance: 2 x 2 Ohms Sensitivity: 87 dB Installation depth: 188 mm Installation diameter: 284 mm Voice coil diameter: 76 mm PROPERTIES Extremely rigid non-pressed paper cone for maximum stiffness Wide low-loss foam surround for maximum cone excursions Concave PP dustcap with embossed HELIX logo 2 x 2 Ohms impedance allows the most flexible configuration High-temperature dual voice coil with enormous winding height for outstanding linear excursion Rock-solid diecast basket with diamond cut Removable rubber gasket Rugged butyl magnet cover with HELIX lettering for perfect magnet protection Solid push terminals for large wire gauge Extremely powerful and massive triple ferrite magnet system TECHNICAL DATA Diffuser material: paper Suspension material: foamed polyurethane Diameter of voice coil, mm: 76 Fs, Hz: 35 Qes: 0.

Power: RMS 250W RMS / MAX 500W Frequency range: 42 Hz - 500 kHz Impedance: 2 x 4 ohms Sensitivity: 90.

Power: RMS 250W RMS / MAX 500W Frequency range: 39 Hz - 500 kHz Resistance: 4 ohms Sensitivity: 82.

Power: RMS 300W RMS / MAX 600W Frequency range: 33 Hz - 500 kHz Resistance: 4 ohms Sensitivity: 85 dB Voice coil diameter: 50mm Weight: 5.

Power: RMS 400W RMS / MAX 800W Frequency range: 27 Hz - 500 kHz Resistance: 4 ohms Sensitivity: 96.

ML subwoofers are the ideal solution for any installation.

Power: RMS 350W / MAX 700W Resistance: 4 Ohms Frequency range: 20 - 900 Hz Sensitivity: 91 dB Voice coil diameter: 51 mm Weight: 4.