Thanks to Essam's detailed work I decided to pull the trigger and start this mod.........I just bought the Pioneer Sub, & Alpine Amp (Same as Essam) .... planning to build the box and install next wknd,..... this project will cost me well under $200....which includes all the MDF, wire, glue, etc. etc.,,,,,,...... Hey Essam I might be calling you for some tech support on wiring....