The three Sound Storm Laboratories models of CL dual voice coil subwoofers are absolute workhorses and are built for speed. The combination of accurate low frequency response and slightly sinister styling allow the CL subwoofers to sink their sharp talons into you from the moment you power up. The CL10D boasts an impressive 1800 watts of peak power handling and excellent frequency response from 35Hz to 2.2kHz. For technical questions about this product including ideal box dimensions, please visit our website, www.soundstormlab.com, or call a technician at 888.38.STORM. Let us prove to you that when it comes to building an impressive and affordable home-quality theater in your vehicle, Sound Storm is your mobile entertainment solution…and everything else is just noise.