18" Ultimax DIY Kit

About the 18" Ultimax DIY Kit

The Parts Express 18" Ultimax DIY Kit is a home-theater subwoofer-building package based on the Dayton Audio UM18-22 18-inch Ultimax dual-voice-coil driver and a CNC-cut, knock-down 4 ft³ sealed MDF cabinet. The kit is intended for high-output, low-frequency reproduction and DIY assembly. Parts Express listings identify the current comparable package as the Dayton Audio 18" Ultimax II with 4 Ft³ Cabinet DIY Home Theater Subwoofer Kit; older references identify a complete powered version as part number 300-7200, which included the original UM18-22, an SPA1200DSP plate amplifier, a modified sealed cabinet, and acoustic stuffing. Because the product name is used for more than one package generation, amplifier inclusion should be confirmed against the specific listing or part number.