I am thinking of building a low Q sealed sub with down-firing Stryke AV12 driver. I have a few questions about the design, and would appreciate some help! First I am going to try to get a Q of 0.55. Is this too low for a music only system? In WinISD this calls for a 70 liter cabinet. So I designed the cabinet on paper with 1” MDF and with braces and got my inside volume to about 70 liters. It came out to be 27” tall, 16” square on the sides. A few questions: Do I still need to use polyfill if my inside volume is already correct? Should I just line the walls? How much effect on the Q would lining the walls have? What wood glue should I use? Should I make the baffle any thicker than 1”? How tall should the legs be for a down-firing sub? Could someone please check my design in WinISD? I just want to make sure it is correct before I proceed in any way… Help would be greatly appreciated! Thanks!