Boss Audio Systems BDVC10 is a 10" (254 mm) Dual 4 Q Voice Coil Subwoofer with 1500 W Peak Power Handling. It features High Temperature Voice Coils and a Plastic Cover. The BDVC10 has a Resonant Frequency of 38 Hz and a Sensitivity of 87 dB. It is designed to work in both sealed or ported enclosures and has a minimum clearance from the rear wall enclosure of 0.75" (19 mm). The BDVC10 is a great choice for anyone looking for a powerful and versatile subwoofer. It can be used in a variety of applications, including home audio, car audio, and marine audio.