Guess what? Im finally going to be starting the building of my first DIY sub in a couple of days. YAY! Ill be ordering my Tempest, AVA250, and (2)ports this weekend. Ok, today I bought the MDF, screws, Liquid Nails, and some speaker wire for the amp to the driver. Besides the components from Adire, all I need is some dampning material. My friend insists that I just go with fiberglass but I remember hearing from some HTFers that fiberglass could come out the port and it could possibly damage the amp and driver. I dont know if thats true but Id rather play it safe. My dad said I should be able to find PolyFill at a craft store. I dont know about that. I looked at Lowes and they just had HUGE blocks of fiberglass, no PolyFill. Is it okay to use fiberglass or is there another substitute? Oh yeah, the cabinet Im making it the same for the Tempest Adire Alignment. With the polyfill in, should I still put some dampning material on the internal cabinet walls? As soon as I start building the cabinet, Ill open up a thread for this project. Ill take some pictures.