The RCC600 in-floor pre-build box is designed to provide the minimum air volume requirement in a sealed and braced in-floor enclosure for the Artison RCC 600. The RCC 600 IFPBB gives the same vibration-free high performance of the In Wall and Freestanding options, this time combined with the stealth of lurking beneath your feet ready to blow mind. This braced MDF cabinet adds to the versatility of the RCC 600 Subwoofer System.