I have ordered a tempest, like a lot of people seem to be doing lately. And I have purchased an 18" tube. I have built excellent cherry top and base plates to cover the plugs. I also ordered two 3" flared ports from adire. Now the questions. The adire alignment on their website seems excellent using the two 3" ports. I was originally going to build a tube to these basic specs. I then started to come across other designs by forum members. One such design is from Dustin. http://dustin.bunnyhug.net/sonostart.php He is using 260L as apposed to the Adire 214L and a 6" port verese two 3" with Adire. Dustins port is over 2 feet long and the Adire alignment is under 1 foot. The Adire Alignment is tuned to 15.4Hz and Dustin's to 17Hz. What are some pro's and con's of each design besides physical size. I understand a larger port will slow down the air in the port, but what is it's effect on the sound besides just air in the port??? Powering the Tempest. This seems to never be discussed. I want to wire the tempest in the way which will give the best possible performance. I will supply as much power is required. What do you recommend? A two channel amp, wiring the two Vc's together? Ideas. The Amp!!! Most people seem to be going with plate amps, this is not my plan. I want the amp in the rack not in the tube. Plate amps typically have a phase, gain, and crossover control. I am not too concerned about the cross over but I would like the other controls. Any suggestions?? I also don't like fans, unless it is super quite. The legs!! This also is never talked about. Adire's legs are 4 inches. Is this a requirement? Hopw much space does a driver need? This sub is going to be tall saving a few inches on the legs would be great!! Thanks to everyone who takes the time to read this and more thanks if you reply. Seems like maybe a sonotube forum is need, with the amount of questions being asked on the subject. To the experts who keep answering all of the questions thanks a bunch, we appreciate it!