900W RMS HEX Pro-Series Dual 4-Ohm TDX Subwoofer Power Rating: Peak: 1800 Watts RMS: 900 Watts Sensitivity: 83.2 dB Mounting Diameter: 11.1" Mounting Depth: 8" Displacement: 0.15 Feet Die Cast Aluminum...

8" BMW-Specific 2-Ohm Car Subwoofers (1 Pair) Power Rating: Peak: 200 Watts Per Side RMS: 100 Watts Per Side Compatible Vehicles: 1-Series: 2004 - Current 3-Series: 2005 - Current 4-Series: 2004 -...