Since my previous thread dissapeared somehow I am reposting this topic for help. After talking with Dan from Adire and Pat from Blueprint, the decision will be tough. The tempest looks best for my application however it will need a much larger enclosure than the 1503 from what I gather. 10ft^3 for the tempest compared to 5ft^3 for the 1503. If this is the case, I will have to favor the 1503 due to size restrictions. I need help with some designs. I'm currently thinking 16 or 18" sonotube no higher than 5 ft total including legs, baseplate, and endcaps. Tuned to 16-18Hz, 6" port, with the flattest response possible. I will sacrifice output for a flatter response. I still want it low and loud though, which I'm sure any design will achieve. Any suggestions and help from you pro's(Jack, Brian, Dustin, Pat, and others) out there will be appreciated. THANKS!