First, PE doesn't fully list the T/S parameters for the HF, so if anyone knows where I can get them, please link!! Now, I was using WinISD for the Titanic MKIII and came up with a 5 ft^3 box tuned to 20Hz. It has 2 ports that are each 2 inches in diameter and 6.97 inches long. Could anyone critique this enclosure and/or possibly suggest another? I only have WinISD, so input from those running other programs is welcome. This enclosure appears to give pretty flat response down to 20Hz with a nice little hump from 20-30Hz that I'm hoping will be good in my large basement. I'm pretty new to HT and vented boxes, as I've only done sealed for car audio. Any input is welcome. I'm looking for really good low-end extension while still being musical. I'm trying to keep the enclosure relatively small, since I'd like to take this with me to college, but I know this can only be realized to an extent... Thanks for the input! P.S. This will be a cylindrical enclosure.