It has been a very long time since I posted to HTF. I recently decided it is time for a subwoofer. I have been doing without one for more than 2 years now, and it's time for something new. I am an apartment dweller, so I am extremely bass-limited. Recently I have decided that I just don't care, and am going to build a sub. My current constraints are just cheap and simple. I manage to spy an excellent deal at Madisound for a PEERLESS 831858 (which is now sold out). Thiele-Small params can be found in the middle of the page here. It is an 8" driver, but the price was really right (like $27.95 right ) so I jumped on it. My goal now is to mate it with a suitable enclosure. I have built an entire set of the Audax HT speakers, so I am no stranger whatsoever to DIY. I have not, however, designed anything. It appears that subs are relatively simple, so I want to give this a go. I was hoping the skilled users at HTF could check over my params. This site suggests that the Thiele-Small params for this driver lend itself to a ported design. WinISD tells me that a 2.2 ft3 box with a port would work well. The result would be a -3 db point at 23.5 Hz, which sounds great to me. I am thinking of getting the PE 2.0 ft3 prefab sub box. WinISD shows vitually no response difference between the 2 ft3 PE box and the ideal 2.2 ft3. I would like to add a 2 7/8" dia. 11.77" long for the port. Am I on the right track here? Am I missing anything? Thanks in advance for your help.