I have a few questions about designing my ported shiva sonotube with LspCad: 1. What does Ql and Qa under "Box" mean? 2. Under measurement setup, what do I put for source resistance? My dual coils will be in parellel, do i put 4ohms? 3. How large should my ports be? I want them to be tuned at 22hz? (No flares) 4. What should the cone excursion graph look like? I get 25mm p-p at 20hz, is that good? 5. How do I get my group delay down? I want it at about 20-25ms @ 20hz. 6. My SPL in room drops heavily at 70-80hz. How do I improve on this?