So after trolling the amp forum for what seems like forever, I am going order a new cab this week. I have decided that my playing style should lend itself well to a 15pr400 loaded 2x15. It will be approximately 22w x 40h x 16d. I figure a net volume of 5.2 to 5.4 ft3 after bracing and porting. My question, is what tuning frequency will work best for me? I am running a GB Streamliner 900 through a p bass. 4 string with occasional drop d tuning. I like running the 900 through cabs with a very controlled low end. It worked great with my sealed 810 and my acme flat wound stack. What tuning will help subdue the big bottom of the Streamliner yet remain full and articulate. Ideally I would like the -10db point to be around 36-37 hz to catch the fundamental of drop d tuning.